Del Potro loses at Masters Guinot Mary Cohr exhibition event
Juan Martin Del Potro, who got in at at the Masters Guinot Mary Cohr after Gael Monfils pulled out, suffered a shock defeat before Roland Garros.
Delpo lost 7-6 6-4 to Simone Bolelli, ranked 111th in the ATP rankings.
The Argentine is still feeling pain on his knee and is trying to get better as soon as he can to be ready for the upcoming French Open.
Paul-Henri Mathieu scored 6-1 6-3 win over Kevin Anderson while Michael Llodra beat Alexandr Dolgopolov 6-1 6-4.
Mathieu has been granted a wild card for Roland Garros because he spent a long time out of the courts due to injury.
Andy Murray is also playing this exhibition tournament but he will take the court on Thursday when he faces Ernests Gulbis.
Milos Raonic has withdrawn and will be replaced by Vasek Pospisil, who will meet Fernando Verdasco.