New Orleans Hornets Chris Paul (L) drives on Los Angeles Lakers Kobe Bryant during Game 2 of their NBA Western Conference first round playoff basketball game in Los Angeles, California April 20, 2011. REUTERS

LOS ANGELES, April 20 - The Los Angeles Lakers came alive following their disappointing playoff opener to grind out an 87-78 victory over the New Orleans Hornets on Wednesday and level their best-of-seven series 1-1.

The San Antonio Spurs also tied up their first round series 1-1 with the Memphis Grizzlies while the Oklahoma Thunder went 2-0 up over Denver.

The defending champion Lakers were shocked in their series opening loss on Sunday when New Orleans point guard Chris Paul ran riot, but they returned with a strong defensive effort and now head to New Orleans for Game Three on Friday.

Andrew Bynum led the way with 17 points and 11 rebounds and Lamar Odom added 16 to offset poor perfromances from Kobe Bryant (11 points) and Pau Gasol (eight).

"I was just trying to be aggressive defensively," Bynum told reporters. "If I play hard defensively, sometimes we get some stops, some good luck and get transition baskets."

Los Angeles established a six-point halftime lead and were up seven after three quarters before stretching their lead to 15 in the fourth where they held off the Hornets.

New Orleans was limited to just 39 percent shooting. Trevor Ariza scored 22 and Paul had 20 for the visitors.

The Spurs, top-seed in the Western Conference, had to once again fight to earn their 93-87 triumph.

They trailed by three points at half-time but were inspired by Argentine shooting guard Manu Ginobli who missed the opening game of the series through injury but returned with 17 points.

But San Antonio kept their cool and George Hill made sure of the win with four points with free throws.

Sam Young top scored for the Grizzlies with 17 points.

The Thunder comfortably took a 2-0 lead in their series against the Denver Nuggets with Kevin Durant scoring 23 points and Russell Westbrook scoring 21 in the 106-89 win.

The Thunder took charge from the outset and had a 26-point lead early in the second quarter as they secured their second win before the series moves to Denver on Saturday for Game Three.