Eva Lys (born 12 January 2002) is a German professional tennis player. Lys reached a career-high WTA ranking of No. 108 in singles on 22 July 2024. She has won three singles titles at tournaments of the ITF Women's Circuit.
As a junior she participated in the Australian Open, winning in the qualifiers but losing in the first round.
Lys made her WTA Tour main-draw debut at the Hamburg European Open when she received a wild card into the doubles draw, partnering Noma Noha Akugue. They lost to Mona Barthel and Mandy Minella in the first round.
Lys made her WTA singles debut at the Porsche Tennis Grand Prix in Stuttgart, coming through the qualifying. She beat Viktorija Golubic in the first round, before losing to world No. 1, Iga Świątek, in the second.
Lys made her Grand Slam debut at the 2023 Australian Open. She reached her best career ranking of world No. 112 on 17 April 2023.
She recorded her first major win at the 2023 US Open on her debut there over wildcard Robin Montgomery, having qualified for the main draw.
She made her main-draw debut at a WTA 1000 level at the 2023 China Open after entering the qualifying competition as an alternate. She reached the semifinals of the 2023 Transylvania Open but lost to eventual champion, fellow German Tamara Korpatsch.
She qualified for the 2024 Wimbledon Championships making her debut at this major. Ranked No. 113, she also qualified for the main draw of the 2024 US Open for a second consecutive year, and lost in the first round in a close three-setter to Marie Bouzková.