OKLAHOMA CITY — Don’t rush back, Luka Doncic.  It’s not worth it. The Lakers can’t beat the defending champion Thunder. You can’t risk further injury.  Doncic spoke to the media Wednesday for the first time since suffering a strained hamstring on April 2. He said doctors initially told him he’d be sidelined eight weeks, which would coincide with the start of the NBA Finals. He confirmed he went to Spain for platelet-rich plasma injections to expedite his return.   “I’m working every day,” he said. “I feel better every day.” With an original timeline of 8 weeks, Lakers star Luka Doncic just passed the 4-week threshold in his recovery from a Grade 2 hamstring strain. The Lakers desperately need Doncic , who was the league’s best player last month, averaging 37.5 points a game while leading the Lakers on a 16-2 run. But it’s not worth the risk. The Lakers are facing the reigning champion Thunder in their second-round playoff series, trailing 1-0 after losing 108-90 on Tuesday.…