2017 U.S. Open winner Sloane Stephens and U.S. soccer star Jozy Altidore are engaged - USA TODAY

2017 U.S. Open winner Sloane Stephens and U.S. soccer star Jozy Altidore are engaged  USA TODAY

2017 U.S. Open tennis champion Sloane Stephens and U.S. soccer player Jozy Altidore are engaged. The couple announced the news Monday on Twitter.