Match Point by R.L. Burgess (tennis)

Roller Girl by Vanessa North (roller derby)

Interference by Zoe Reed (hockey)

Crash Into You by Diana Morland (roller derby)

Break Point (Historical) and Lucky Loser (Contemporary) by Yolanda Wallace (tennis)

Bonus: Tumbling by Caela Carter has a lesbian POV (YA, Olympic gymnastics), although there is no romance, and the You Know Who Girls series by Annameekee Hesik (basketball) has f/f romance and a lesbian protag but is not a Romance by definition