William Hill retirement rules help please

[Slam Tennis]

If I backed Nishikori 'to win a set' and he is losing 2-0 to murray and then retires, is the bet settled as a loser or is it voided ?

 

This is with William Hill

 

Here are the rules which I can't interpret, maybe I'm dim

 

If a player is disqualified or retires from the match and a winning selection in this market has been established in the time played before disqualification or retirement, bets placed on that selection will have already won and will be settled as winners. Bets placed on other selections in this market will have already lost.

• If a player is disqualified or retires from the match and no winning selection in this market has been established in the time played before disqualification or retirement, bets placed on this market will be void because the match did not play for the full duration.

 

I think he's value to take a set but he is the sort of player that could retire so I really would want to know what the actual rule is?

 

What's your interpretation please?

[CzechPunter]

Didn't notice this until today and I have to say that this is some confusing wording indeed. I guess that it would be voided, but I haven't had a bet at William Hill for a very long time, so can't say with certainty.