The Swiss Belinda Bencic, holding also Slovak citizenship through her parents, has worked extensively with Melanie Molitor and Martina Hingis, as well as her father, Ivan, in the
She played her first WTA qualifying event at Luxembourg in October 2011, and her first WTA main draw 12 months later at same event as a wild-card (l. V.Williams in the first-round) at only 15 years, 7 months.
She won the junior singles titles at Roland Garros and Wimbledon in 2013. Predictably she was named ITF Junior World Champion for that year.
In 2014 Bencic achieved her best Grand Slam singles result when she advanced to the quarter-finals at US Open. During that run, she defeated two Top 10 players (No.7 Kerber in the third-round, No.10 Jankovic in the round-16). At 17 years of age, she was the youngest player through to last eight at Flushing Meadows since 1997 when Hingis won the title. She was also runner-up in Tianjin (l. to Riske) and losing semifinalist in Charleston (l. to Cepelova). At the end of the season, Bencic was voted 2014 WTA Newcomer of the Year after rising 179 spots in the rankings to finish season at No.33.
In 2015 she won her first two career titles. In Eastbourne (d. Radwanska), aged 18 years, 109 days, she became the second‐youngest player to win a WTA Premier‐level final behind Caroline
Wozniacki who won 2008 New Haven aged 18 years, 43 days. In Toronto (d. Halep via retirement) she became the first teenager to win an event at Premier 5 level or higher since Azarenka at 2009 Miami. En route to the final, she claimed the best win of her career over No.1 Serena Williams in the semifinals. At 18 years of age, she became the youngest player to defeat Serena in a completed match since 2004 WTA Finals, when 17‐year‐old Sharapova defeated her in the title match (Serena also lost at 2007 Charleston to then 17‐year‐old Chan Yung‐Jan via first set retirement at 5‐3).
She lost two finals in 's-Hertogenbosch (l. Giorgi), and Tokyo [PPO] (l. A.Radwanska) and reached the round 16 at Wimbledon. She qualified for 2015 WTA Elite Trophy in Zhuhai however she withdrew due to hand injury. Bencic claimed also the first two doubles titles in her career in Prague (w/Siniakova) and Washington, DC (w/Mladenovic).
She struggled with injury in 2016. Bencic became the first Swiss woman to reach the round 16 at Australian Open (l. Sharapova) since Hingis and Schnyder in 2007. She managed to advance to her sixth career singles final at St Petersburg in February (as top seed for first time in career, l. Vinci). Her final-run there saw her break into the Top 10 (at No.9) for the first time in her career. She became the 116th player to break
into the Top 10 since computerized rankings were introduced in 1975, one of the 11 in the last 20 years, to make their Top 10 debut before their 19th birthday. She reached a career-high ranking of No.7 on February 22, 2016, but after Charleston (April) was sidelined for more than two months and missed most of clay season, including Roland Garros.
Posted third straight Top 50 finish in 2016, at No.43, down from No.14 in 2015. In 2017, she decided to open the season by representing Switzerland at Hopman Cup in Perth and won the title partnering with Roger Federer.
She underwent left wrist surgery in the Spring of 2017, missing five months of play and her ranking slipped outside the Top 300. Choosing to graft her way back up the rankings, Bencic closed out 2017 season by winning 28 of 31 matches and winning four titles, two on the ITF Circuit and two WTA 125K Series events at Hua Hin, Thailand and Taipei. By the end of the year she was back in the Top 75.