Austrian Jurgen Melzer accused umpire Magdi Somat of being "cocky" after he was issued with a court violation for racquet abuse.
Melzer was playing in the men's double alongside American James Blake, against Ivan Dodig and Marcelo Melo.
After losing the first set, Melzer and Blake then complained that the umpire was ignoring audible let calls.
The duo lost the match 5-7 0-6 7-6 4-6.
Meanwhile, India's Rohan Bopanna sealed a spot in his first ever Wimbledon semi-finals with French partner Edouard Roger-Vasselin. The 14th seeds knocked out sixth seeded Swede-Canadian combination of Robert Lindstedt and Daniel Nestor with a 7-5, 7-6(3), 6-7(4), 6-7(3), 6-2 win.
Kyle Edmund sees off good friend O'Mara
Kyle Edmund earned the bragging rights from his all-British showdown with friend Jonny O'Mara as he reached the Wimbledon boys' quarter-finals.
The 18-year-olds, the last remaining British juniors in the singles, are long-time friends, having met an under-12s tournament in Corby.
Beverley-based Edmund has even been giving Arbroath's O'Mara a lift to Wimbledon this week, with the latter posting a photo on Twitter of this morning's journey saying the "banter's flying around".
There has been verbal jousting in the build-up as well, with the Scottish wild card gleefully pointing out that he won their only ever previous meeting.
Leander Paes has an up and down sort of a day
Leander Paes had a mixed day as he advanced to the men's doubles semi-finals with Czech Radek Stepanek but suffered a tame defeat in the mixed doubles with Chinese partner Saisai Zheng.
Paes and Stepanek, seeded fourth, carved out a 4-6, 6-4, 6-3, 6-4 win over 11th seeded Julien Benneteau of France and Nenad Zimonjic of Serbia.
In the mixed doubles, 15th seventh seeds Paes and Zheng, lost 3-6, 3-6 to unseeded American-French combo of Eric Butorac and Alize Cornet.
Mahesh Bhupathi's Wimbledon campaign ended after losing the fiercely-fought men's doubles quarter-final along with partner Julian Knowle to top seeded American twins Mike and Bob Bryan.
The eighth-seeded Indo-Austrian pair fought their hearts out before bowing out with a 6-7 (5), 6-7 (3), 6-7 (4). Sania Mirza made it to the pre-quarterfinals of the mixed doubles with Horia Tecau beating Martin Emmrich and Julia Goerges 6-3, 6-4.
However, Andy Murray's sometime practice partner Edmund made amends by winning the last-16 clash 6-3 6-2 on Court 14.