Lakers guard Kobe Bryant was visibly upset after the team lost Game 4 of the Western Conference Finals to the Suns on Tuesday night.

The series is now tied at two games apiece.

"We have to play with a sense of urgency," Bryant said, "and understand this team can beat us."

Los Angeles center Andrew Bynum mentioned facing the Celtics in the NBA Finals after the team took a 2-0 series lead late last week.

"We lost the game," Bryant said of Game 4, "because our defense sucked.

"Our focus was on the other side of the floor, which doesn't win championships. So we need to get back to ground zero when it comes to that."