The tennis star and her basketball co-“star” are set to tie the knot, as TMZ reports: “Los Angeles Laker Sasha Vujacic just locked down tennis hottie Maria Sharapova … proposing marriage to her with a massive engagement rock to rival any Lakers championship ring. Sources tell TMZ the pair — who were first spotted holding hands about a year ago — got engaged Tuesday after Sasha popped the question at his home in Manhattan Beach, CA.”