2015: Juniors Kessler won the U16 doubles title at the
Orange Bowl with Emma Kurtz in 2015.
2024: Major & WTA Tour debuts, first title Kessler made her
WTA Tour debut at the
Auckland Open after qualifying. She lost in the first round to
Lulu Sun. For her major debut, she received a wildcard for the
Australian Open, after winning the USTA's Wild Card Challenge, and reached the second round, recording her first major match win over qualifier
Fiona Ferro. She lost in the second round to
Linda Nosková. In February, she won the biggest title of her career to that date at the WTA 125 in
Puerto Vallarta, defeating
Taylah Preston in the final. In March, she received a wildcard from the
Indian Wells Open making her WTA 1000 debut there, losing to
Nuria Párrizas Díaz in the first round. In April, she entered the main draw of the WTA 500
Charleston Open as a lucky loser, making her debut at this level. She lost in the first round to
Caroline Wozniacki. Kessler qualified for the
Wimbledon, making her debut at this Grand Slam tournament, losing to ninth seed
Maria Sakkari in the first round. Following winning a W100 title in
Landisville, Pennsylvania, she reached the top 100 on 12 August 2024. At the
Tennis in Cleveland, she reached her first WTA Tour quarterfinal by defeating fellow wildcard
Katrina Scott and fourth seed
Wang Xinyu for her first top 50 win. Next, she defeated
Arantxa Rus in straight sets. Kessler reached her first final with a come-from-behind three set victory over fifth seed
Anastasia Potapova, for her second top 50 win, and won her maiden Tour title defeating top seed
Beatriz Haddad Maia. She also received a wildcard for the
US Open making her debut at her home Grand Slam event, losing in the first round to 19th seed
Marta Kostyuk.
2025: Top 30, WTA 1000 singles 4th rounds and doubles title Kessler started her season at the
Brisbane International, where she defeated
Magda Linette, before losing to 15th seed
Yulia Putintseva in the second round. The following week, she reached the final at the
Hobart International with wins over seventh seed
Rebecca Šramková,
María Lourdes Carlé top seed
Dayana Yastremska and sixth seed
Elina Avanesyan. In the championship match, Kessler defeated second seed
Elise Mertens in three sets to secure her second career title. As a result, she reached the top 50 at world No. 47 in the WTA singles rankings on 13 January. In February, at the
Dubai Open, Kessler defeated
Amanda Anisimova in the first round and then overcame world No. 3,
Coco Gauff, to record her first win against a top-5 ranked player. She lost in the third round to
Karolína Muchová in a match which went to a deciding set tiebreak. Kessler reached the final at the
ATX Open and despite losing to top seed
Jessica Pegula, she returned to the top 50, at world No. 48. Alongside
Zhang Shuai, she was also runner-up in the
doubles at the same tournament, losing the championship match to
Anna Blinkova and
Yuan Yue. In June at the
Nottingham Open, Kessler defeated top seed Beatriz Haddad Maia,
Zhu Lin, two-time defending champion
Katie Boulter and Rebecca Šramková to make it through to the final. She also won the championship match against Yastremska, in straight sets, to claim her third career title. As a result, she reached the top 30 on 30 June 2025. Ranked No. 32 at the
Canadian Open, she reached a WTA 1000 fourth round for the first time in her career upsetting world No. 5 and fourth seed,
Mirra Andreeva, en route, her second top 5 win. At the same tournament, she lifted her first doubles title and first at the WTA 1000 level with Coco Gauff, defeating world doubles No. 1,
Taylor Townsend and Zhang Shuai.
2026: Abu Dhabi and Charleston quarterfinals Competing at the
Australian Open, Kessler was defeated in the second round of singles by Jessica Pegula. She and Pegula played the women's doubles together but lost in the first round to
Gabriela Dabrowski and
Luisa Stefani. while the following month she also made it through to the last eight at the
Charleston Open, this time falling to
Yuliia Starodubtseva. ==Career statistics==