World number two Novak Djokovic won on his return to the tour as he beat France's Gilles Simon in his opening match of the Monte Carlo Masters.
The Serb, playing his first clay match of the year after recovering from an elbow injury, won 6-3 3-6 7-5.
The 29-year-old secured the first set before Simon saved four break points in the second to change the game's tempo.
Simon, ranked 32nd, had the chance to serve for the match but Djokovic fought through to reach the last 16.
Djokovic, a two-time champion in Monte Carlo, received a bye in the first round and appeared to feel some strain in his right elbow in a close final set against Simon.