Branislav Ivanovic
The 31-year-old Serbian is generally a very consistent performer but he was skinned alive by Jefferson Montero and lacks the pace to prevent a strong winger from easing past him.
Whilst all the talk this summer has been about Jose Mourinho looking to bring in a left-back to act as back-up to Cesar Azpilicueta, with Filipe Luis rejoining Atletico Madrid, Chelsea could do with a fresh right-back to keep Ivanovic on his toes.