BELGRADE, Serbia (AP)—Top-seeded and defending champion Novak Djokovic retired with breathing problems during his quarterfinal match against Filip Krajinovic at the Serbian Open on Friday.

Novak Djokovic, for one, has credited breathing exercises with helping him ... Through the day, take a few deep breaths, diaphragmatic breaths; this will make it feel more natural when you ...

That’s why the moment it ended, Djokovic let out a belated roar towards his court-side box, where Andy Murray paused for a deep breath. Djokovic went up and singled out coach Murray for a hug.

Novak Djokovic, with old rival Andy Murray in his coaching corner, is optimistic he can put together a deep run at the Indian Wells ATP Masters to kick start a so-far disappointing 2025 campaign. “ ...