SHANGHAI: Fernando Alonso said Thursday he expects another difficult weekend wrestling with his new Aston Martin at the Chinese Grand Prix after failing to finish the season-opener in Australia. Silverstone-based Aston Martin endured a horror start after serious issues with their Honda power unit and a lack of spare parts. Two-time world champion Alonso and teammate Lance Stroll had to endure extreme vibration in the chassis caused by the power unit, which was feared could cause the drivers permanent nerve damage.