ahead of Ralf Schumacher as Michael Schumacher returned to the lead. Montoya pulled off to the side of the track with smoke bellowing from his engine on lap 53, ending his race. Barrichello entered the pit lane for his third and final stop on the next lap. It took 7.7 seconds and he emerged in third position. On lap 56, Irvine stopped on the grass at the right-hand side of the Adelaide hairpin with a pneumatic valve system failure. Coulthard drew close to Barrichello at the Adelaide hairpin on lap 58 after the latter ran wide. He dropped back from Barrichello through Estroil corner three laps later. Button pirouetted through 720 degrees into the gravel trap at the Adelaide hairpin because he pushed too hard and had oversteer on the 63rd lap though he continued. He consequently had too deal with heavy vibrations at high speeds from flat-spotting a tyre after locking the wheels for a long period of time under braking. Further down the field, de la Rosa overtook Alonso for 15th position, and Alonso was called into the pit lane to retire with suspected engine problems located on the Minardi telemetry equipment. On lap 68, Coulthard to pass Barrichello on the left-hand side of the track on the run to the Adelaide hairpin while the two lapped Alesi's slower car though he could not complete the manoeuvre as Barrichello accelerated faster than him at the corner. On lap 71, an oversteer and a rear tyre lock sent Button into a spin through 180 degrees into a gravel trap and retired with a fuel pressure pick-up problem. Upfront, Michael Schumacher was told over the radio to reduce his pace to avoid excessive strain on his car, and he maintained the lead to take his sixth victory of the season and the 50th of his career. Ralf Schumacher was 10.399 seconds behind in second and Barrichello completed the podium finishers in third. Off the podium, Coulthard finished fourth, Trulli fifth and Heidfeld completed the points-scoring positions in sixth. Post-race The top three drivers appeared on the podium to collect their trophies and spoke to the media in a later press conference. Michael Schumacher said he was delighted to take the 50th victory of his career though he explained his priority was to win the race and focus on securing the Drivers' Championship, "People seem to misunderstand my feeling about these