Penguins goalie Marc Andre-Fleury turned aside 30 shots for his fourth shutout of the season and second in three games, following a 3-0 win over Florida on Tuesday. He has stopped all but four of 106 shots in his last three games.
Ovechkin's 13-game scoring streak for Washington, the NHL's longest this season, and Crosby's eight-game run ended in a game that featured excellent penalty-killing and goaltending but minimal scoring. Only two days before, both teams played in games that had a total of nine goals scored.
Crosby leads the NHL with 82 points and Ovechkin has a league-high 33 goals.
Petrovicky, injured or scratched for more than half of the Penguins' games this season, not only scored the most important goal but did so unassisted. Washington's Eric Fehr missed on a backhander halfway through the second period and Petrovicky picked up the puck in the corner and skated up the right wing boards.
Petrovicky hesitated momentarily at the top of the right circle and faked a pass, only to throw a wrist shot on the net that eluded Olaf Kolzig, who otherwise stopped 18 shots.
Penguins rookie Jordan Staal scored into an empty net with 38 seconds remaining, off Evgeni Malkin's pass, for his 17th goal.
Ovechkin had scored in every Capitals game this calendar year, getting eight goals and 12 assists in 13 games. He was last scoreless Dec. 30 against the Rangers. Crosby hadn't been shut out since Jan. 10 at Florida.