Sauber not using F-duct in China

Pedro de la Rosa qualified just seventeenth in Shanghai.

"We lack top speed," said the Sauber driver.

After innovators McLaren, the Swiss team had been the first to implement an F-duct solution, but it was not running on the C29 in China.

"We had to put the standard wing back on. It worked on Friday but not today," the 39-year-old told Spain’s Marca newspaper on Saturday.

After Ferrari, Mercedes and Williams also experimented with F-duct solutions in China, it is expected that the bulk of the remaining established teams - Renault, Red Bull and Force India - could debut wing-stalling systems in Spain next month.