World No. 18 Karen Khachanov (Russia) suffered an unexpected defeat at the French Open (Roland-Garros).
In the second round, the Muscovite Armenian tennis star faced World No. 145 Jozef Kovalik (Slovakia), who won in five sets after losing the first two sets. The match lasted 4 hours and 31 minutes.
In the third round, Kovalik's opponent will be World No. 13 Holger Rune (Denmark).
The prize fund of the French Open is 53.4 million euros.
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