Damir Dzumhur vs Matteo Arnaldi — QF — Croatia Open Umag

Nothing on the stat sheet split these two, so three tiebreaks did. Matteo Arnaldi out-pointed Damir Dzumhur 129 to 128 and matched him hold for hold at 15 of 18 service games, yet the fourth seed (a 66 percent favorite with the market) dropped two of the three breakers. The ATP No. 108 did his heaviest lifting early, digging out of a 2-5 hole in the opener with breaks in game 8 and game 10 for 5-5 before taking the tiebreak. Dzumhur closed the third breaker 3 hours and 36 minutes in, notching his first win over Arnaldi on record and a semifinal berth at Croatia Open Umag.