Early career

Tessari first stepped onto the ice as a one-year-old but was not interested in skating at that age; she returned to skating when she was five.^[3] As a single skater, she was coached by her mother, Cristina Mauri, at Mediolanum Forum di Assago.^[4]

At age 14, Tessari teamed up with her first ice dancing partner, Stefano Colafato.^[3] The two made their international junior debut in November 2010 at the Pavel Roman Memorial. Their ISU Junior Grand Prix debut came in September 2011. In January, they placed eighth at the 2012 Winter Youth Olympics in Innsbruck, Austria.

Tessari/Colafato were coached by Roberto Pelizzola and Nicoletta Lunghi at Forum S.S.D.R.L.^[5] Their last competition together was the Santa Claus Cup in December 2014. They decided to part ways due to problems in their partnership.^[3]

2015–2016 season

Barbara Fusar-Poli asked Tessari to try out with Francesco Fioretti.^[3] After a few months of skating together, Tessari/Fioretti formalized their partnership.^[3] The two made their international debut in September 2015, at the Lombardia Trophy. They finished fourth at the Italian Championships.^[6]

2016–2017 season

Tessari/Fioretti won bronze at the 2016 NRW Trophy. After becoming the Italian national bronze medalists, they were sent to the 2017 European Championships in Ostrava, Czech Republic; they finished 22nd in the short dance and did not advance further.

2017–2018 season

In December 2017, Tessari/Fioretti won bronze at the Italian Championships. In January, they qualified to the free dance and finished 18th overall at the 2018 European Championships in Moscow, Russia. They concluded their season with silver medals at the Bavarian Open and Egna Spring Trophy.

2018–2019 season

Tessari/Fioretti opened their season with silver at the 2018 NRW Trophy and then placed fourth at two ISU Challenger Series events, the 2018 CS Lombardia Trophy and 2018 CS Ondrej Nepela Trophy. They took bronze at the 2018 Ice Star in October. In November, the two debuted on the Grand Prix series, placing eighth at the 2018 Grand Prix of Helsinki. After winning the silver medal at the Italian Championships, Tessari/Fioretti placed fourteenth at the European Championships, and attended their first World Championships, where they placed twenty-fourth.

2019–2020 season

Tessari/Fioretti placed twelfth at the 2019 CS Lombardia Trophy to begin the season, before making their second appearance on the Grand Prix at the 2019 Rostelecom Cup, where they placed tenth. After their second consecutive national silver medal, the two competed at the 2020 European Championships, placing sixteenth.^[7] This would prove to be their final competition together, as their partnership ended afterward.

2021–2022 season & new partnership

In July, it was announced that Tessari had teamed up with Swiss skater Stéphane Walker, and that the two would be competing for Switzerland.^[8] Tessari/Walker won the Swiss national title in their inaugural season, and then debuted at the European Championships with a nineteenth-place finish.^[9]

With Walker

With Fioretti

With Colafato

With Walker for Switzerland

With Fioretti for Italy

With Colafato for Italy

Ladies' singles for Italy