World number 11 Gael Monfils revealed he would be sidelined with knee and Achilles injuries.
The Frenchman has enjoyed a solid start to the year, but was knocked out by Dominic Thiem in the last 16 of the BNP Paribas Open.
Monfils, a two-time grand-slam semi-finalist, said on Monday he would need to enter a recovery program due to knee and Achilles injuries.
"The exams that I did today have revealed a chondropathy of my left patella and a tear in my left Achilles heel," he wrote on Twitter.
"I will start tomorrow a rehabilitation program and will do all it takes to recover as soon as possible."
Monfils holds an 8-4 win-loss record this year, including reaching quarter-finals in Marseille and Dubai.