Ivo Karlovic: A 36 year old Croatian 6 ft 11 inch serving machine (that’s also a record height for the ATP tour past and present). If you’ve heard his name, you’ve probably heard the word “ace” in the same sentence. Karlovic has made a Wimbledon record by serving 40+ aces in his first 3 matches and is 2nd on the all time list of total aces (nearly 400 shy of Ivanisevic and leading 3rd place Roger Federer by 400 as well). He’s the oldest player to make the 4th round since 1976 and has been playing some sublime tennis of late. He just defeated French Open Jo-Wilfred Tsonga in 4 set and appears to gaining momentum at the age of 36.

At 36 yrs 134 days, Ivo Karlovic is the oldest man to reach the last 16 at #Wimbledon since Niki Pilic in 1976 pic.twitter.com/ttSXTbk8Vi — Wimbledon (@Wimbledon) July 4, 2015

Why does this spell disaster for Andy Murray? The last time they played at Wimbledon in 2012, Murray scraped by Dr. Ivo 7-5, 6-7, 6-2, 7-6. Although the other 4 matches they’ve played have gone to Murray, they almost have all gone to distance or ended in a tiebreaker.

He's done it! @andy_murray powers his way past Andreas Seppi 6-2, 6-2, 1-6, 6-1 to face Ivo Karlovic in the last 16 pic.twitter.com/1Fh8vtVEd0 — Team GB (@TeamGB) July 4, 2015

Andy Murray dropped a set to Seppi earlier today en route to his 4th round berth after injuring his shoulder and calling a medical timeout. Though he said it was feeling fine, expect soreness and tightness in that region to play a factor. Ivo Karlovic employs a deadly slice off his backhand side. In order to counteract such a shot, Murray would need to brush up on the ball heavily with top spin. However, limited mobility in his shoulder would deprive him of the ability to do so.

Andy Murray may be one of the best returners in the game but I expect him to have the match of his life against this towering Croatian. Perhaps we’ll see another variation of this tweet after the match?