Daniil Medvedev and Stefanos Tsitsipas will reignite their often ill-tempered rivalry when they meet in the French Open quarter-finals on Tuesday.
Greek fifth seed Tsitsipas has previously referred to Medvedev's game as "boring" and remarked the two "would not go for dinner together".
And Russia's Medvedev suggested this week that relations had not improved.
"It seems to me that we respect each other as players but not too much on a personal level," the second seed said.
Medvedev leads their head-to-head 6-1 and thrashed Tsitsipas in straight sets when the two met in the Australian Open semi-finals in January.