Karlovic sets record with 61 aces in win

The 37-year-old Croat, who has served the most aces in ATP Tour history with well over 11,000, hit 22 in the second set alone as he outgunned Lu 4-6 7-6(4) 6-7(4) 7-6(5) 7-5. 

Tuesday’s total beats the previous record of 49 set by the Dutchman, Richard Krajicek, in the quarter-finals in 1999. “I knew there were a lot of aces because at one stage I was serving one on almost every point but I didn’t know it was a record,” Karlovic said. However, only 10 of the aces came in the final set.