French Open Day 4 order of play: Rafael Nadal and Roger Federer among seven players to watch - in pictures

Defending and 11-time men's champion headlines the fourth day of action at Roland Garros

Stefanos Tsitsipas. The Greek sixth seed got his French Open campaign up and running with a straight sets win over Maximilian Marterer. He is first on Court Simonne Mathieu against Hugo Dellien, the world No 86 from Bolivia who also impressed in his first round match against India’s Prajnesh Gunneswaran. Anything less than another comfortable outing for Tsitsipas will be a surprise. Reuters

Rafael Nadal. The defending and 11-time champion swept into the second round with a ruthless win over Yannick Hanfmann and faces another qualifier called Yannick in the second match on Court Suzanne Lenglen - this time Germany's Maden who earned his place with his own straight sets victory against Kimmer Coppejans. Expect another routine Nadal win. AFP

Marin Cilic. The Croatian 11th seed competes in the tie of the second round against Bulgarian Grigor Dimitrov in the third match on Court Simonne Mathieu. Cilic impressed in his opening round win over Thomas Fabiano, while Dimitrov made hard work of beating Janko Tipsarevic in five sets having led 2-0. Cilic is favourite for this given Dimitrov’s recent struggles, but the former world No 3 is more than capable of springing a surprise, particularly as clay is both players’ weaker surface. EPA

Roger Federer. The 2009 champion made a successful return to Paris after a three-year absence by defeating Lorenzo Sonego in straight sets in the first round. In the third match on Court Philippe Chatrier, third seed Federer takes on lucky loser from Germany Oscar Otte, who beat Malek Jaziri in four to reach this stage. Federer is the overwhelming favourite to reach the third round. Getty Images

Sloane Stephens. First up on Court Philippe Chatrier, last year’s finalist Stephens takes on Spain’s world No 75 Sara Sorribes Tormo. Seventh seed Stephens defeated Misaki Doi in straight sets in the first round, while Sorribes Tormo needed three to get past Alison Van Uytvanck. The American won their only previous meeting last month on the Charleston clay and should make it two from two. Getty Images

Karolina Pliskova. The recently-crowned Italian Open champion continues her pursuit of a first grand slam title in the second match on Court Simonne Mathieu. Second seed Pliskova was a comfortable winner in the first round against Madison Brengle and will face Slovakian qualifier Kristina Kucova, who defeated former champion Svetlana Kuznetsova. Pliskova looks on course to extend her fine form and reach the third round. Getty Images

Kiki Bertens. Dutch fourth seed Bertens competes in the final match on Court Philippe Chatrier against Slovakia’s Victoria Kuzmova. Bertens began her French Open campaign with an efficient win over Pauline Parmentier, while Kuzmova defeated Alize Cornet. This could be an interesting test for Bertens, who has twice played Kuzmova this year with one win each. If Bertens continues her impressive recent form, though, there should only be one winner. AFP

Day 4 at the French Open sees the men's and women's singles tournaments enter the second round and there are a hots of top stars in action on Wednesday.

Ahead of the start of play, Jon Turner has selected seven players to watch in the photo gallery above.

Here is Wednesday's order of play for the stadium courts. Numbers denote seedings:

Court Philippe-Chatrier

Play starts at 1pm

7-Sloane Stephens (US) v Sara Sorribes Tormo (Spain)

7-Kei Nishikori (Japan) v Jo-Wilfried Tsonga (France)

Oscar Otte (Germany) v 3-Roger Federer (Switzerland)

Viktoria Kuzmova (Slovakia) v 4-Kiki Bertens (Netherlands)

Court Suzanne-Lenglen

Play starts at 1pm

Kateryna Kozlova (Ukraine) v 9-Elina Svitolina (Ukraine)

Yannick Maden (Germany) v 2-Rafa Nadal (Spain)

31-Petra Martic (Croatia) v Kristina Mladenovic (France)

Benoit Paire (France) v Pierre-Hugues Herbert (France)

Court Simonne-Mathieu

Play starts at 1pm

6-Stefanos Tsitsipas (Greece) v Hugo Dellien (Bolivia)

Kristina Kucova (Slovakia) v 2-Karolina Pliskova (Czech Republic)

Grigor Dimitrov (Bulgaria) v 11-Marin Cilic (Croatia)

15-Belinda Bencic (Switzerland) v Laura Siegemund (Germany)