Damn, I went for 3 upsets in football last night and all hit. None of them on Chilistakes though. Probably exhausted my luck that way haha.
I mean, it was City against Al Hilal, of course I had to bet on the match

I had Foden & Leonardo both to score with @10, turned out the bet was voided because Foden wasn't a starting player. I learned many things from Chilistakes sportsbook.
I never heard they void it if a player does not start, usually it is voided only if he does not play at all. Anyway - Foden scored in OT so it would be a lost ticket.
I did hunt surprises yesterday, I was close to one with Fognini. Also had Duckworth against Aliassime, both of them on insane odds after they went a set down.
Definitely never seen a void when a player actually plays. Plenty of bets lost because a player only played a few minutes as a sub -- so I guess that void rule would have come in handy in the past with cases like that.
But as mafia points out, ET would have ruled the bet out, so you saved some money anyway.
In tennis, I hunted a surprise against Paolini (surprised to see her Latvian opponent start I thought she retired). Lost the first set, struggled on the second but she was the only one playing in the the last, so I lost there. Wimbledon feels like a really nice place to hunt. Plenty of 10/1 odds, too bad I didn't sniff out Medvedev's shitshow.