Nico Rosberg and Lewis Hamilton admit tyre wear a concern in heat of Malaysia
Silver Arrows still fastest, but tyre fears return as Mercedes as drivers suffer 'massive degradation' and World Champs Red Bull close the gap
Sunday 30 March 2014 13:32, UK
Mercedes' apparent speed advantage over the chasing - but closing - pack may be stymied by fears over tyre degradation on the W05 after a longstanding weakness in the Silver Arrows package returned with a vengeance in Friday practice at Sepang.
