Mikhail Youzhny's final ever tournament ended at the last-16 stage as Roberto Bautista Agut knocked out the Russian in his 499th tour-level match.

Youzhny, 36, had already confirmed the St Petersburg Open would be his final competition before bowing out and Agut ended his career with a 7-6 (8-6) 3-6 6-3 victory.

"From the beginning until the end, I was professional," Youzhny said in quotes published on the ATP's website.

"The level of my game in the last match shows that I'm retiring actually at a very good level."