French Open - 'It's just not on!' - Novak Djokovic forced to wait an age as Rafael Nadal leaves for break
"There isn't a rule on the timing, and there should be," said Simon Reed, on commentary for Eurosport while Rafael Nadal took an age to return to the court after the second set. "Again, we've got a very long wait here. However good he has been, and whatever he represents, and he has been fabulous in almost every single way, this is just not on! I really do think there should be a time rule."
'It's just not on!' - Djokovic forced to wait as Nadal takes long break
"There isn't a rule on the timing, and there should be," began Reed, on commentary at the time. "Again, we've got a very long wait here.
However good he has been, and whatever he represents, and he has been fabulous in almost every single way, this is just not on!
"I really do think there should be a time rule, unless there is a specific problem which could get monitored. We'll still wait, because he has got to get things sorted - have a drink, sort everything out."
'Lights out play!' - Nadal with 'something special' against Djokovic
Miles Maclagan added: "It's such a tough one to monitor. So often it's to let the euphoria die down and there is a lull in the first couple of games.
"Nadal has been pushed extremely hard and he is absolutely drenched!"
'Where did that come from?' - Djokovic laughs at Nadal brilliance with mad shot
While Djokovic would go on to break serve in response to the Spaniard winning the opening set 6-3, the 13-time champion at Roland Garros saved this particular break point with a truly sublime effort.
"It has to be that good at the moment!" exclaimed Reed as Nadal left Djokovic laughing with a drop shot played while running backwards and to the side in a desperate reaction.
"Where did that come from?" wondered Maclagan. "You see how sweetly the return was struck that it forced Nadal into that sort of shot, but the hands are just so good, the awareness of where the racket face is."
Djokovic, 34, has won the French Open once, in 2016, compared to Nadal's 13 titles at Roland Garros but both men are in the hunt to end their careers with the most Grand Slam titles to their names.
The winner of this titanic clash will take on Stefanos Tsitsipas, who earlier reached his first Grand Slam final - and made history by becoming Greece's first to do so too.
The fifth seed showed all his class and supreme form as he battled past Alexander Zverev, 6-3 6-3 4-6 4-6 6-3 in their semi-final on Friday afternoon.