Fils is only 20, but he has already faced Zverev four times. While the Frenchman has only won once, three of those matches have gone the distance. On grass in Halle last year, Zverev won 6-4 in the third set. In the Hamburg final on clay soon after, Fils spoiled Zverev’s hometown party, 7-6 in the third. And then later in the year, on indoor hard courts at Bercy, Zverev turned it back around, 6-3 in the third.

Now they’ll meet in a round of 16 encounter that was postponed due to rain on Tuesday. Each of these guys looks poised to break out of a slump.

Fils struggled to get any traction early in the season, but he has found it on U.S. hard courts this month. He made the quarters in Indian Wells, and beat Frances Tiafoe in three sets on Monday.