Why did Kubler retire?

Was big on the over23 in the Kubler/O’Connell Marchand was pumped when O’Connor took the 2nd to guarantee the over then shocked when Kubler retired before 3rd set started

Ouch. 

Paire's retirement was rotten fish,,,how does the tour not reprimand him based on his long track record of these shenanigans.

This is the part of tennis wagering that looks terrible and completely opens itself up to questions. 

Paire is known for this bs. Just put him and basically every other french player on the dnb list honestly. 

I thought it was just coincidence but it's not. This crap used to happen to me all the time. I'm convinced paire is dirty as hell. Kubler I have no idea..

Raducanu quits down 3-0 in the 3rd set of a semi-final rather than take an official L,,,the more the tour allows this to happen, the more they look like a clownshow to books and affiliates,,,piss off the books enough, look out at the repercussions.

Tennis is playing with fire if they don't put a stop to this bs

Tomova with arguably one of the most suspicious retirements in 2022... She was a point away from being up 5-0 in the first set,,,one can only imagine certain mafia syndicates loading up on the favored Begu in the 1st set, only to have the books put a stop to these shenanigans by calling the tournament director and forcing the match to end by retirement,,,don't laugh, it's true,,,and it's happening all around  on a consistent basis...be very aware about all different books rules on retirements, and tread carefully moving forward with these low level 125 and 250 events.

https://www.flashscore.ca/game/YZ75jHnG/#/game-summary/point-by-point/0

Kubler defeated 19th seed Roberto Bautista Agut in his only previous US Open appearance to earn his first Grand Slam-level main draw victory. In the following round, he was forced to retire due to an ankle injury. Those memories, according to Kubler, are "bittersweet."