WASHINGTON (AP) Ivo Karlovic's big serve carried him to a second consecutive final at age 37, earning a 6-4, 6-4 victory over fifth-seeded American Steve Johnson at the Citi Open on Saturday.
The 6-foot-11 Karlovic, a Croatian seeded 13th at the hard-court tournament, saved all five break points he faced in the semifinals. He has won all 43 of his service games this week.
He broke Johnson in the third game of each set.
Karlovic will face No. 2-seeded Gael Monfils of France or No. 7 Alexander Zverev of Germany in Sunday's final.
Last week, at the grass-court tournament in Newport, Rhode Island, Karlovic became the oldest man since 1979 to win an ATP singles title.