Defending champion Andy Murray and 17-time Grand Slam winner Roger Federer advanced to the fourth round of the Sony Open with convincing straight sets wins. Federer, twice a winner on the Miami hardcourts, needed just 62 minutes to dispose of Dutch qualifier Thiemo de Bakker. The resurgent Federer has shown that he is coming to grips with a new larger racket, a change that the Swiss had initially resisted. Meanwhile, Murray appeared to be adjusting just fine to life without coach Ivan Lendl, easing past Spain’s Feliciano Lopez. Wimbledon champion Murray was commanding against Lopez, improving his record to 9-0 against the Spaniard in just 73 minutes. -- Mornings @ ANC, March 24, 2014.