That year, she also won a gold medal for Switzerland in mixed doubles at the Summer Youth Olympics in Nanjing.

Later that year, she reached the final of the Cincinnati Open, a WTA 1000 event, defeating Naomi Osaka, Belinda Bencic, and Karolína Plíšková, before falling to world No.

She then continued with success, winning the title in doubles at the Grade-A Trofeo Bonfiglio, and reached the semifinals in singles.

She then won the 2014 US Open girls' doubles title along with İpek Soylu, defeating Vera Lapko and Tereza Mihalíková in the final.

In October 2014, she reached her first ITF final, but lost to Polina Leykina at the $10k event in Sharm El Sheikh.

In August 2015, she won her first ITF title at the $15k event in Braunschweig, defeating Ekaterina Alexandrova in the final.

[6] Teichmann won her first WTA Tour singles title when she came through qualifying to win the Prague Open in May 2019, beating Karolína Muchová in the final.

[6] The following week, she won the Palermo Ladies Open, securing her first top-10 win with a victory over Kiki Bertens in the final.

She defeated three Romanian players in a row, Mihaela Buzărnescu, Monica Niculescu[13] and Patricia Maria Țig,[14] right before she faced a loss against Marie Bouzková.

[23] Ranked 76th at the WTA 1000 Cincinnati Open, Teichmann reached the final as a wildcard player, defeating en-route world No.

[24] She reached her third career WTA 1000 semifinal at the Madrid Open, following four consecutive straight-set wins over Petra Kvitová, Leylah Fernandez, Elena Rybakina, and Anhelina Kalinina in the quarterfinals.

[27] At the Italian Open, she recorded a back-to-back win against Rybakina at the same level as the WTA 1000 Madrid to reach again the quarterfinals in an over three-hours marathon match.

[29] At the French Open, she had reached the third round, after beating Olga Danilović in straight sets, for the first time in her career in the eleventh attempt.

[33][34][35] Seeded 18th at Wimbledon, after having an incredible run at the French Open, Teichmann lost in the first round to Ajla Tomljanović, in straight sets.

[39] Teichmann won her first WTA 125 title at the Ljubljana Open defeating Nuria Párrizas Díaz in the final.

[40] She also reached the final of this tournament in doubles, partnering Lina Gjorcheska, but they lost to Nuria Brancaccio and Leyre Romero Gormaz.

[40] Teichmann qualified for the main-draw at the Singapore Open and defeated Harriet Dart[41] and Olivia Gadecki[42] to reach the quarterfinals, where she lost to fourth seed Wang Xinyu in three sets.

[43] She won her second WTA 125 title at the Mumbai Open, defeating Mananchaya Sawangkaew in straight sets in the final.

[46] At the 2014 Summer Youth Olympics in China, she won the gold medal in mixed doubles, partnering Jan Zieliński.

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.