2021 U.S. Open men's semifinal odds, predictions: Proven tennis expert reveals Djokovic vs. Zverev picks, bets | CBS Sports Headlines 2021 U.S. Open men's semifinal odds, predictions: Proven tennis expert reveals Djokovic vs. Zverev picks, bets Men’s tennis handicapper Sean Calvert has locked in his Zverev vs. Djokovic picks for … Continue reading 2021 U.S. Open men's semifinal odds, predictions: Proven tennis expert reveals Djokovic vs. Zverev picks, bets