The pair appeared tense, jubilant and nervous - at times hiding their faces behind their hands - as they watched the men's 3x3 basketball at La Concorde in Paris on Monday.
Damian Smith, 36, and Dawn Thompson (pictured), 48, carried out the attack in January on their victim, a shopworker, who moved to the UK in 2019 and has been granted asylum.
The former glamour model was absent at a scheduled £760,000 bankruptcy court hearing on Tuesday, having flown overseas for her latest cosmetic procedure.
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The French president, who is beleaguered by political chaos after calling a last minute election earlier this summer, told participants afterwards to be 'proud' of their performance.
Humphries is a very short odds-on favourite at 4/9 to come away with the victory, while Van Gerwen is a 13/8 outsider, according to Sky Bet.
