Ivo Karlovic broke the record for the most aces served in a US Open match during his win over Yen-Hsun Lu on Tuesday.
The Croatian fired no less than 61 aces during the five set epic, eclipsing the previous longstanding record of 49 set by Richard Krajicek in 1999.
Karlovic's reaction? He didn't really know…
"I knew there were a lot of aces because there was a period when almost every serve was an ace," quipped the gentle giant, who wears size 18s.
"I knew there was a lot but I didn't know it was this many."
Yeah got some shoulder issues ? https://t.co/NGL0dYs5F8
— ivo karlovic (@ivokarlovic) August 31, 2016
It may come as no surprise that Karlovic is no stranger to ace records. In 2015, the 37-year-old powered 45 aces in a three set match against Tomas Berdych, setting a new record.
He also holds the record for the most aces ever, a whopping 11 216 throughout his career, over 1000 more than his closest rival Goran Ivanisevic. Karlovic also served 78 aces during a Davis Cup tie in 2009.
Karlovic's main weapon has made him somewhat of an enigma on the ATP Tour, case in point being his 2-1 winning record over the indomitable Novak Djokovic.
To put it bluntly, the man is a serving machine…and he knows it.
"Of course…this is my best shot," added the 37-year-old.
"I have worked a lot on it. I'm proud of it."