Roy Halladay pitched a complete game and continued his domination of the visiting New York Mets in the Philadelphia Phillies’ 2-1 win Saturday afternoon.

Halladay (4-1) allowed one earned run on seven hits and struck out eight to improve to 6-0 against New York as a member of the Phillies. The reigning National League Cy Young Award winner also became the first pitcher since 1990 to throw 18 straight strikes to open a game, and led Philadelphia (18-8) to its fourth straight win over its National League rival.

He outdueled Jonathon Niese (1-4) for the second time this season, even though the New York lefthander looked like an ace for six powerful innings. Niese was charged with two earned runs on six hits with three strikeouts in 6 1/3 innings.

Carlos Beltran put the Mets (11-16) up 1-0 with an RBI single in the fourth before John Mayberry Jr. tied it with his first home run in the seventh. Placido Polanco’s sacrifice fly produced the go-ahead run later in the seventh off Taylor Buchholz to give Philadelphia its league-leading 18th win and stretch New York’s losing streak to three games.