Novak Djokovic says hearing long-time rival Rafael Nadal announce he intends to retire in 2024 has made him question how long he too will continue playing.
Djokovic, 36, could win his 23rd major title at the French Open, pulling him clear of the injured Nadal and taking the outright men's singles record.
"It made me wonder about my career and how long I might play," said the Serb.
"When he announced he is going to have his last season, I felt part of me is leaving with him too."
Nadal has won a record 14 titles at Roland Garros but misses the clay-court Grand Slam for the first time in 19 years because of a long-term hip injury.