A spot in the next round is at stake on Wednesday, when Matteo Arnaldi goes up against Rei Sakamoto in the Tokyo round of 32. Rei Sakamoto has won 5 of the last 10. Matteo Arnaldi is searching for form, having lost 3 in a row (4 of the last 10).

The serve is where this match separates: Sakamoto has been winning 73.7% of first-serve points to Arnaldi's 70.1%, and on hard that gap compounds fast. This one is close to a coin flip, and the lean toward Sakamoto is exactly that — a lean.