Serena Williams vs Shuai Zhang - Tiebreak Tens 2018 

Serena Williams suffered a semifinals defeat to Shuai Zhang at the Tie Break Tens, her first singles competition in 2018.
The eight-woman competition at Madison Square Garden was a winner-take-all tournament for $250,000 to the victor. Each head-to-head battle was scored in a tiebreak format, with the first to 10 points (with at least a two-point margin) moving onto the next round.
Williams beat Marion Bartoli 10-5 in the quarterfinal Monday but couldn't close things out against Zhang in a 13-11 loss. Elina Svitolina won the tournament by outscoring her final two opponents 20-3.
Williams will make her 2018 WTA Tour debut this week at the BNP Paribus Open at Indian Wells. She will face Zarina Diyas in the first round in what could be a tough test for the unseeded player.