World number one Novak Djokovic accepts Rafael Nadal starts as favourite at the French Open.
After Andy Murray's withdrawal, defending champion Nadal is likely to be third seed in Paris having returned to action in February after more than seven months out with a knee injury.
The Spaniard, who is going for his eighth title in Paris, has won six of eight tournaments since his comeback, one of only two defeats coming against Djokovic in the final of the Monte Carlo Masters.
Victory in the principality was the highlight of an otherwise indifferent claycourt campaign for Djokovic, who lost to Grigor Dimitrov in Madrid and Tomas Berdych in Rome.
The Serb, who needs only the French Open title to complete a career grand slam, lost to Nadal in the final last year.
Djokovic told Sky Sports News: "Over the years I've had some great results in Roland Garros.
"I've played pretty well over the last few weeks. Maybe I didn't have the results I would have wanted but I still feel good about my chances.
"Nadal is obviously the main favourite, the defending champ and we all know how good he is on that surface. Then there's Federer and myself but anybody can win a grand slam."