Originally Posted by Protoss
Umpire Kader Nooni screwed over Nalby.
You can argue both for and against Nooni's call. DN did take a long time challenging, but it was a bit unclear whether the ball had been called in so his hesitation is understandable. But it was stupid of him to argue so long. That long break did wonders for Isner's mobility.
No record, though. Match lasted 'only' 4h41m.