What jinx?! Don't count your chickens yet, you make it sound like he already lost the tournament! His prediction can pretty much still happen (Not saying it's too likely, but not ruled out just yet totally...), maybe Zverev or Alcaraz will play awe-inspired match of their career in the semis and bam - Sinner is gone suddenly...and then whoever wins that semi-final can potentially be easier target for Novak in the final assuming Novak himself wins over Medvedev (which btw isn't unlikely, even in these conditions...), it will likely require incredible physical effort from Novak, but he beat the odds many times in the past and as of very recent during his run in Paris masters, which according to his condition he shouldn't have even reached the final of,let alone winning it...