Nico Rosberg set the quickest time for Mercedes during a disrupted first practice session for the Chinese Grand Prix on Friday morning.
Rosberg clocked a time of 1:38.037, 0.146s clear of team-mate Lewis Hamilton, though neither Mercedes driver had a clean session.
Rosberg pitted during the closing stages with a suspected power unit issue while Hamilton spun twice at Turn 11.
However, the session was disrupted by left rear tyre incidents for Felipe Massa and Kevin Magnussen.
Massa suffered a left rear problem approaching Turn 6 and spun through the gravel, bringing out the red flag, before encountering another issue when he later returned to action.
Magnussen also suffered a left rear failure on the back straight though was able to return safely to the pit lane.
Sole tyre supplier Pirelli confirmed that the issues were not tyre related.
Sebastian Vettel was the fastest non-Mercedes runner, 0.6s behind Rosberg, with Daniel Ricciardo in fourth place for Red Bull.
Their respective team-mates, Kimi Raikkonen and Daniil Kvyat, were fifth and sixth, ahead of Toro Rosso's Carlos Sainz Jr.
Jenson Button was eighth for McLaren while team-mate Fernando Alonso was 12th on his return and has been cleared to drive for the remainder of the weekend.
Nico Hulkenberg and Max Verstappen rounded out the top 10.