Ducati Marlboro Team rider Casey Stoner dominated both practice sessions at Brno today, only bettered by Guintoli using qualifying tyres at the very end of this afternoon's outing. As usual, Stoner and Loris Capirossi only used race tyres on the first day of practice, Stoner comfortably fastest on race tyres and the impressive Capirossi just four tenths slower than his team-mate, was baulked by a slower rider on his fastest lap. Both riders were delighted to be back in action after the sport's traditional summer break that followed last month's US GP, won in masterful style by Stoner who currently leads the World Championship by 44 points.