What's the quarrel about ? Not good optics on TV to see two opposing players confronting each other when they should turn to the umpire for clarification and decision, or any complaints. OK, I understand now, Mad was faulted for hitting the shuttle that already touches the ground and he thought Kevin's racquet crossed the net and hit the shuttle at him. Good for the umpire to quickly take charge of the situation and resolve the issue and sternly warning the two players not to challenge each other.
Kevin yellow-carded for misconduct yet still defiant and ignoring the umpire who has been quite patient actually. I'd have thought a red card might be in order
Madsx2 must be kicking themselves for the near miss in G2 leading by a good margin to wrap it up in two sets.