Yankees 4, Nationals 1: Ivan Nova continued his string of strong starts with 7 2/3 solid innings and Curtis Granderson hit his 21st home run as visiting New York completed a three-game sweep at Washington.

Robinson Cano added a solo homer and Mark Teixeira drove in a run and scored one for the Yankees, who have won nine straight and are 10-2 in interleague play.

The Nationals, who entered the series on a six-game win streak, were swept at home for the first time since last July.

Nova (9-2) was charged with one run - a solo homer by Adam LaRoche - and seven hits while walking one and striking out four. He has won five straight starts and has allowed two runs in 22 2/3 innings this month.

Rafael Soriano worked the ninth for his 13th save.

Edwin Jackson (3-4) got the start for Washington and ran into trouble immediately, allowing back-to-back hits to start the game. The right-hander managed to limit the damage to Teixeira’s sacrifice fly in the frame and cruised through the next three innings before Granderson led off the fifth.

Jackson tried to sneak a changeup past on a 1-1 count and Granderson belted it into the Nationals bullpen.

Cano’s 12th blast came off Tom Gorzelanny in the seventh, and the Yankees added another run on a passed ball.

GAME NOTEBOOK: New York RF Nick Swisher (quad) got the day off after coming out of Saturday’s contest. He is day-to-day. … Washington will continue its tour through the American League East gauntlet when it opens a three-game series with the Tampa Bay Rays on Monday at Nationals Park. The Yankees host a three-game set against the Atlanta Braves. … New York improved to 21-13 on the road - the best mark in the majors.