Media commented that Grigor had a medical timeout at the first set 5-4 and after that made some errors wich caused him losing the set. So it is really an injury
this is a google translation of the article:
To scare the young Bulgarian and tournament director. Not so much that Dimitrov had played three sets. When the level of play is good, it's always good for the show. What makes us fear the worst is that it 5-4 for the first set, Dimitrov-seeded No. 1 in the table, called the physio for a hamstring concern and is ... out of the game for several games. Clearly embarrassed about endorsements, including its mugs of setbacks, he has made mistakes and allowed the unusual first set in Switzerland Bohli. The level of play is suddenly dropped a notch and it was clearly fears a drop in the stands full of Chantereyne well. That would put a hit on the head in the tournament. But no, that's why, among other things, we are told that this young Bulgarian is definitely very strong, Dimitrov was handed in, distilling his backhand a la Roger Federer to exit Stephane Bohli, who has finally let go. But one question: can he really go after the tournament, fell well?
Stephane Robert, 31, the surprise guest
His chances against Grigor Dimitrov? Thin. But Stephane Robert assets. It is an experienced player, who plays his age rather released by betting on tennis fun, choosing his tournaments often based tourist resorts. With Dimitrov, he often sets of drives. "I feel he may be a form of respect. I know that I dread. That may be my chance. "And we know now, the Bulgarian is not really 100% physically. For Robert, there may be a small break.