Argentina great Lionel Messi and his family watched tennis legend Novak Djokovic dominate Grigor Dimitrov in the Miami Open semifinal yesterday. After the match, Messi visited the locker room, meeting Djokovic and Czech teen Jakub Mensik. The 19-year-old, starstruck, joked about not washing his hand after shaking Messi's, believing it brought him luck. Inspired, Mensik stunned Taylor Fritz to secure a Masters 1000 final against Djokovic. After his win, he scribbled, "Thank you Leo" on the camera. Meanwhile, Djokovic, chasing his 100th title, expressed his delight on social media: "An honor to meet greatness."