Sixth-seeded German Alexander Zverev has knocked out former world No.4 Kei Nishikori for a third consecutive tournament to become just the second German man -- behind Boris Becker -- to reach at least three Roland-Garros quarter-finals.
Zverev, who is now 5-1 overall against Nishikori and has defeated the Japanese player in Madrid and Rome last month, posted a 6-4, 6-1, 6-1 win on Sunday in a night-session showdown on Court Philippe-Chatrier in less than two hours.