Reigning RBC Tennis Championships of Dallas singles champ Ryan Harrison earned his first doubles title of the year this May.

Harrison teamed up with New Zealander Michael Venus as the pair took out Tommy Robredo and David Marrero 7-5, 6-2 to win the Millennium Estroil Open – an ATP 250 event.

The win turned out to be a nice present for Harrison who celebrated his 25th birthday on the tournament’s final day.

Venus and Harrison began the week by knocking off the top-seeded team of Sam Groth and Robert Lindstedt 6-3, 5-7, 10-4 en route to the championship final.

Harrison finished as a runner-up with Steve Johnson this year at the last ever Memphis Open.