UNIONDALE — Just when it seemed John Tavares' NHL debut would be perfect, Sidney Crosby wrecked the ending for the prized rookie and the New York Islanders.

The 22-year-old Crosby had a goal and assist to reach 400 career points in only 292 NHL games, and then netted the shootout winner in a 4-3 victory over the Islanders on Saturday night.

Until New York squandered a pair of one-goal leads in the third period, the night belonged to Tavares — the first pick in this year's draft. He scored a go-ahead goal and added an assist, but couldn't come through in the opening-night shootout.

"We were in their face for most of the game," the 19-year-old Tavares said. "We played true Islander hockey. The result was disappointing, but we're playing the Stanley Cup champs and there was a lot of positives to take from it."

Tavares went second for New York in the shootout and fired wide. Jeff Tambellini rang a shot off the post on the Islanders' first attempt before Penguins defenseman Kris Letang beat Dwayne Roloson in the tiebreaker.

Roloson, in his Islanders debut, looked sharp in making 39 traditional saves. Marc-Andre Fleury was just as good in stopping 25 shots.

Just 17 seconds after defenseman Mark Eaton lifted Pittsburgh into a 2-2 tie 7:19 into the third, Trent Hunter restored New York's lead with a one-timed shot from the right circle.

Ruslan Fedotenko — shaken up earlier on a hard hit from New York's Brendan Witt — banked a shot off the skate of Islanders defenseman Bruno Gervais with 3:49 left in regulation to make it 3-3.

Tavares helped set up Mark Streit's tying goal in the first period and then scored to give the Islanders a 2-1 lead.

When he backhanded a loose puck past Fleury during a power play at 7:09, Tavares went down to a knee and pumped his fist as his equally excited teammates raced over to celebrate with him. Hunter retrieved the puck for the new face of the franchise.

"I was so happy for him," linemate Kyle Okposo said. "There is so much pressure on him and he takes it with such a cool head."

Crosby scored his second goal of the season just 8:50 in on a breakaway. Crosby also scored Friday in the Penguins' season-opening 3-2 victory over the New York Rangers after the championship banner was raised.

"This was not an easy week, and what could have been a mail-in when we say 'Oh, it's not our night' we put our nose down, went to work as a group and were able to scratch out two points," Penguins coach Dan Bylsma said.

Tavares' arrival and his quick start have already provided hope that the Islanders might be able to turn things around after posting the NHL's worst record last season (26-47-9).