Wednesday's Cincinnati round of 32 pits Frances Tiafoe against Learner Tien on hard. Learner Tien has won 6 of the last 10. Frances Tiafoe has won 8 of the last 10.
The underlying stats are tight across the board — this is a matchup decided by a handful of points. A tiebreak or two would surprise nobody, with Tien fractionally more likely to land the big points.