Mirra Andreeva rose to a career-best No. in the tennis rankings on Monday, making the Russian the first 17-year-old in the WTA's Top 10 since Nicole Vaidisova in 2007. Andreeva moved up five spots thanks to her title Saturday in Dubai, where she beat past Grand Slam champions Iga Swiatek, Elena Rybakina and Marketa Vondrousova en route to becoming the youngest player to claim the trophy at a WTA 1000 tournament.