The winter transfer window opened for business on January 1 and clubs around the world are busy at work adding to their squads for the rest of the season and beyond.
The first eye-catching deal of the month saw Netherlands international Cody Gakpo join Liverpool from PSV Eindhoven, following an impressive World Cup in Qatar, where he scored in all three group games.
Chelsea, who last summer set a record for most money spent in a single window (£278.4m), have been busy bolstering their squad with the arrival of French defender Benoit Badiashile from Monaco, while youngsters Andrey Santos and David Datro Fofana have been recruited from Vasco de Gama and Molde respectively.
The Blues also completed a loan deal for Atletico Madrid forward Joao Felix, although his promising debut ended in a nightmare after he was sent off against local rivals Fulham. The big-spending London club then completed the biggest deal of the month by acquiring Mykhaylo Mudryk from Shahktar Donetsk, stealing in at the 11th hour when the Ukrainian forward appeared destined for Arsenal.
The most talked about transfer saw Portuguese superstar Cristiano Ronaldo sign for Saudi club Al Nassr on a two-and-a-half year deal, having become a free agent in November following his contract termination at Manchester United.
With a few days remaining in the transfer window, Newcastle United completed the signing of Anthony Gordon from Everton, while Chelsea continued their lavish spending spree with a deal for Lyon full-back Malo Gusto, who will spend the rest of the season on loan at the French club.
Check out the photo gallery above to see the biggest deals of the January transfer window. To move on to the next photo, click on the arrows or swipe if using a mobile device.