London - Rafael Nadal has become used to getting sanctioned for slow play, but on Thursday at Wimbledon he was warned for wasting time before a ball had even been hit in anger.
The world number one was preparing for his Wimbledon second round match against Kazakhstan's Mikhail Kukushkin on Centre Court.
However, veteran umpire Carlos Bernardes issued a warning to the 17-time Grand Slam title winner who was still sitting on his courtside chair.
"I didn't know but I don't see a clock here. I don't see that countdown. It's more difficult for me to understand what's going on," said the 32-year-old Nadal after his 6-4, 6-3, 6-4 win.
"In Australia and Roland Garros, we have the clock so that we can manage to be under control."
Nadal was warned again by Bernardes before the start of the third set.
"That's normal. I was slow at that moment. I know I had to take the wristband, T-shirt, banana out, change everything," explained Nadal.
"Probably I should go to toilet. If I go to the toilet, I had plenty of time to change everything without the time violation. I decided to stay on the chair.
"I was slow enough to receive a time violation. Yeah, I accepted. That's all. I think I was very quick during the match.
"Between sets I needed that time to change all these stuff because was a very humid day, that's all."
Thursday's incidents are not the first time that Nadal and Bernardes have clashed.
In 2015, Nadal asked for Bernardes not to officiate at his matches after an incident in Rio de Janeiro over the Spaniard's shorts.
Nadal had arrived on court with his shorts on back to front but he was told to change them on court.
Despite that bizarre argument, Nadal insists he does not have a personal issue with the veteran umpire.
"For me personally that was disrespectful," he said.
"I put my shorts on the other way. You cannot force me to change my shorts in front of everybody, you know. For me, that's not respectful.
"I respect when I am slow, I accept the warnings. I do my best to be quick.
"Sometimes I'm not good enough to be that quick. I need my time to think about what to do for the next point, that's all."
Wimbledon results on Thursday, the fourth day of the 2018 championships (x denotes seeded player):
Philipp Kohlschreiber (GER x25) bt Gilles Muller (LUX) 7-6 (8/6), 7-6 (7/4), 7-6 (7/3)
Kevin Anderson (RSA x8) bt Andreas Seppi (ITA) 6-3, 6-7 (5/7), 6-3, 6-4
Guido Pella (ARG) bt Marin Cilic (CRO x3) 3-6, 1-6, 6-4, 7-6 (7/3), 7-5
John Isner (USA x9) bt Ruben Bemelmans (BEL) 6-1, 6-4, 6-7 (6/8), 6-7 (3/7), 7-5
Stefanos Tsitsipas (GRE x31) bt Jared Donaldson (USA) 6-3, 6-2, 3-6, 4-6, 6-3
Thomas Fabbiano (ITA) bt Stan Wawrinka (SUI) 7-6 (9/7), 6-3, 7-6 (8/6)
Karen Khachanov (RUS) bt Marcos Baghdatis (CYP) 6-3, 6-4, 3-6, 6-7 (4/7), 7-5
Frances Tiafoe (USA) bt Julien Benneteau (FRA) 4-6, 6-3, 6-4, 6-2
Kyle Edmund (GBR x21) bt Bradley Klahn (USA) 6-4, 7-6 (7/0), 6-2
Novak Djokovic (SRB x12) bt Horacio Zeballos (ARG) 6-1, 6-2, 6-3
Nick Kyrgios (AUS x15) bt Robin Haase (NED) 6-3, 6-4, 7-5
Kei Nishikori (JPN x24) bt Bernard Tomic (AUS) 2-6, 6-3, 7-6 (9/7), 7-5
Ernests Gulbis (LAT) bt Damir Džumhur (BIH x27) 2-6, 6-4, 6-3, 1-6, 6-3
Juan Martín Del Potro (ARG x5) bt Feliciano Lopez (ESP) 6-4, 6-1, 6-2
Benoît Paire (FRA) bt Denis Shapovalov (CAN x26) 0-6, 6-2, 6-4, 7-6 (7/3)
Gilles Simon (FRA) bt Matteo Berrettini (ITA) 6-3, 7-6 (7/4), 6-2
Matthew Ebden (AUS) bt Stéphane Robert (FRA) 6-3, 7-6 (7/5), 4-6, 6-1
Jirí Veselý (CZE) bt Diego Schwartzman (ARG x14) 6-3, 6-4, 7-6 (7/3)
Fabio Fognini (ITA x19) bt Simone Bolelli (ITA) 6-3, 6-4, 6-1
Alex De Minaur (AUS) bt Pierre-Hugues Herbert (FRA) 6-2, 6-7 (8/10), 7-5, 6-3
Rafael Nadal (ESP x2) bt Mikhail Kukushkin (KAZ) 6-4, 6-3, 6-4
Suspended for darkness:
Taylor Fritz (USA) leads Alexander Zverev (GER x4) 4-6, 7-5, 7-6 (7/0)
Simona Halep (ROM x1) bt Zheng Saisai (CHN) 7-5, 6-0
Hsieh Su-Wei (TPE) bt Lara Arruabarrena (ESP) 6-3, 6-3
Dominika Cibulkova (SVK) bt Johanna Konta (GBR x22) 6-3, 6-4
Elise Mertens (BEL x15) bt Sachia Vickery (USA) 6-1, 6-3
Jelena Ostapenko (LAT x12) bt Kirsten Flipkens (BEL) 6-1, 6-3
Vitalia Diatchenko (RUS) bt Sofia Kenin (USA) 6-4, 6-1
Daria Gavrilova (AUS x26) bt Samantha Stosur (AUS) 6-4, 6-1
Aliaksandra Sasnovich (BLR) bt Taylor Townsend (USA) 6-0, 6-4
Alison Van Uytvanck (BEL) bt Garbiñe Muguruza (ESP x3) 5-7, 6-2, 6-1
Anett Kontaveit (EST x28) bt Jennifer Brady (USA) 6-2, 7-6 (7/4)
Ashleigh Barty (AUS x17) bt Eugenie Bouchard (CAN) 6-4, 7-5
Daria Kasatkina (RUS x14) bt Yulia Putintseva (KAZ) 6-2, 6-3
Angelique Kerber (GER x11) bt Claire Liu (USA) 3-6, 6-2, 6-4
Naomi Osaka (JPN x18) bt Katie Boulter (GBR) 6-3, 6-4
Carla Suárez (ESP x27) bt Sara Sorribes (ESP) 6-4, 6-1
Belinda Bencic (SUI) bt Alison Riske (USA) 1-6, 7-6 (12/10), 6-2
Barbora Strycova (CZE x23) bt Lesia Tsurenko (UKR) 6-1, 6-4
Katerina Siniakova (CZE) bt Ons Jabeur (TUN) 5-7, 6-4, 9-7