SPOKANE, Wash. (AP) - What's wrong with Klay Thompson, who's been leading the Pacific-10 in scoring until a recent slump?

Washington State coach Ken Bone is not sure, but the team is working hard to get Thompson back on track.

Thompson is still averaging more than 20 points per game, but his point totals and shooting percentage have dropped precipitously since Pac-10 play started. Part of that is because he is the focus of defenses.

Bone thinks the sophomore's technique is fine, so coaches are working on ways for Thompson to get more open looks at the basket.

"We're trying to get him where he's getting better looks at the hoop," Bone said. "He needs to hit a few. Once he has his confidence back he will be fine."

Thompson is still averaging 21.6 points per game, second in the Pac-10 to Landry Fields of Stanford (22.3). That falls to 17 ppg in league play, and he is shooting just 24 percent from 3-point range.

In his past two games, Thompson made just 5 of 17 field goals and scored 13 points in a loss at UCLA. Thompson did not start Saturday at Washington because he was late for a team bus. When he got in he had his worst outing of the season, making just 2 of 15 and scoring a season-low seven points.

Freshman guard Reggie Moore has picked up some of the scoring slack. The only freshman starting point guard in the league, Moore is averaging 14.3 points and 4.5 assists per game.

Nik Koprivica, the team's lone senior, has also stepped up. Koprivica, in his first start of the season, had 13 points and 11 rebounds against the Huskies, and may start again, Bone said.

Koprivica leads the Pac-10 in 3-point shooting at 50 percent, making 30 of 60 shots. He is also on the cusp of becoming the winningest basketball player in WSU history. Koprivica has won 83 games in his WSU career, second on the list. George Hamilton, who played in 1945 and from 1947-49, was part of 86 victories.

Bone is also worried about the declining production of post DeAngelo Casto, WSU's main inside threat. Casto had four points and two rebounds against the Huskies.

Thompson and Casto are great players and a main job in the second half of Pac-10 play will be to get them playing like they did earlier in the season, Bone said.

"It's not like they have been horrible, but we need to create more opportunities for them to be successful," he said. Casto still leads the league in blocks at 2.1 per game.

Washington State (14-7, 4-5 Pac-10) is one of five teams tied for third in the league. Cal and Arizona are first with 6-3 records, while Arizona State and UCLA are second at 5-4.

The Cougars host Arizona State on Thursday and Arizona on Saturday.

Bone said the Cougars need to improve their transition defense and rebounding as they make a bid for postseason play in the remaining nine games.

"We need to stay locked in mentally and understand our principles and concepts," Bone said. "We've got to dig deep and sprint back on defense better than we did at Washington."

Washington State led Washington 40-36 at halftime, then was blown out in the second half. They missed their first 13 shots of the second and were outscored 56-24.