Allison and Isaac are shaking it up LIVE at the US Open Mixed Doubles Championship with America's #1 collagen brand, Vital Proteins. Things get spicy with Allison and Isaac debating if they'd make a good mixed doubles team PLUS they spill the tea on which celeb couple they'd want to take on in a match. But the real tea...whether Allison's former NFL defensive end husband could actually take down Serena Williams in a match... Listen into this episode of Sunday Sports Club and check out their chat at a tournament unlike anything we've ever seen before at the US Open! 

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