• epa05175098 Arsenal playmaker Mesut Oezil during a training session with team mates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
    epa05175098 Arsenal playmaker Mesut Oezil during a training session with team mates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
  • epa05175101 Arsenal manager Arsene Wenger during a training session at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
    epa05175101 Arsenal manager Arsene Wenger during a training session at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
  • epa05175103 Arsenal teammates during a training session at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
    epa05175103 Arsenal teammates during a training session at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
  • epa05175173 Arsenal striker Danny Welbeck (L) during a training session with teammates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
    epa05175173 Arsenal striker Danny Welbeck (L) during a training session with teammates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
  • epa05175189 Arsenal team mates Per Mertesacker (L) with Aaron Ramsey during a training session with team mates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
    epa05175189 Arsenal team mates Per Mertesacker (L) with Aaron Ramsey during a training session with team mates at Arsenal's training complex at London Colney, north of London, Britain, 22 February 2016. Arsenal play Barcelona in a Champions League Round of 16 soccer match at the Emirates Stadium in London 23 February. EPA/ANDY RAIN
  • The Arsenal team attend a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    The Arsenal team attend a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • Arsenal's French striker Olivier Giroud (C) attends a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's French striker Olivier Giroud (C) attends a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • Arsenal's German midfielder Serge Gnabry (2nd R) and Nigerian player Alex Iwobi (R) take part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's German midfielder Serge Gnabry (2nd R) and Nigerian player Alex Iwobi (R) take part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • Arsenal's French midfielder Mathieu Flamini (L) takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's French midfielder Mathieu Flamini (L) takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • Arsenal's English defender Kieran Gibbs (L) and English striker Danny Welbeck take part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's English defender Kieran Gibbs (L) and English striker Danny Welbeck take part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • Arsenal's Czech goalkeeper Petr Cech is pictured as he takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's Czech goalkeeper Petr Cech is pictured as he takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
  • ST ALBANS, ENGLAND - FEBRUARY 22: Danny Welbeck (C) of Arsenal warms up with team mates during the Arsenal training session ahead of the UEFA Champions League match against Barcelona at London Colney on February 22, 2016 in St Albans, United Kingdom. (Photo by Matthew Lewis/Getty Images)
    ST ALBANS, ENGLAND - FEBRUARY 22: Danny Welbeck (C) of Arsenal warms up with team mates during the Arsenal training session ahead of the UEFA Champions League match against Barcelona at London Colney on February 22, 2016 in St Albans, United Kingdom. (Photo by Matthew Lewis/Getty Images)
  • ST ALBANS, ENGLAND - FEBRUARY 22: Calum Chambers (L) and Danny Welbeck warm up with team mates during the Arsenal training session ahead of the UEFA Champions League match against Barcelona at London Colney on February 22, 2016 in St Albans, United Kingdom. (Photo by Matthew Lewis/Getty Images)
    ST ALBANS, ENGLAND - FEBRUARY 22: Calum Chambers (L) and Danny Welbeck warm up with team mates during the Arsenal training session ahead of the UEFA Champions League match against Barcelona at London Colney on February 22, 2016 in St Albans, United Kingdom. (Photo by Matthew Lewis/Getty Images)
  • Arsenal's Chilean striker Alexis Sanchez is pictured as he takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK
    Arsenal's Chilean striker Alexis Sanchez is pictured as he takes part in a training session ahead of the UEFA Champions League round of 16 1st leg football match against Barcelona at Arsenal's London Colney training ground on February 22, 2016. Arsenal will play against Barcelona at the Emirates Stadium in London on Tuesday February 23, 2016. / AFP / GLYN KIRK

Alexis Sanchez and Arsenal prepare for giant Barcelona task – in pictures


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