Before the Mavericks' first game with Portland, the focus in Dallas was on Michael Finley's return from a strained left hamstring. But the real concern is over Steve Nash, who has battled a sore right hip since December. "I had a setback before the game while I was stretching," says Nash, who shot 3 for 11 for 10 points in last Saturday's 96-86 win. "It's been really painful for a long time." ...Last season the Lakers held opponents to an NBA-low 42.4% from the field, but this year Los Angeles was 17th in the league in that category, at 44.3%. During the Lakers' season-ending 31-9 run, opponents shot slightly better—44.7%. Not since the 1995-96 Bulls (44.8%) has a team won the championship with a worse defense.