"We have had a few problems this weekend," admitted Webber, who had no comment to make on rumours sweeping the media that he's set to quit F1 for World Endurance Championship.
None of the eight drivers suspected of using DRS under yellow flags at the 2013 Chinese GP will be penalised - but Red Bull is fined for unsafe release.
Fernando Alonso put in a perfect display of race craft in Shanghai, the Ferrari driver ten seconds clear of Kimi Raikkonen at the climax of the 2013 Chinese GP
"If we'd brought the hard tyre, we would probably be looking at one stop," says Pirelli's Paul Hembery. "We're confident that we're in for another action-packed race tomorrow."