Chelsea will reportedly have scouts in attendance to run the rule over Middlesbrough's Ben Gibson during the newly promoted side's Premier League match with Arsenal at the Emirates Stadium on Saturday.
The 23-year-old is one of several players Chelsea manager Antonio Conte is said to be considering to help bolster a suspect defence, including Burnley centre-back Michael Keane.
Chelsea feel Arsenal will provide a thorough examination of Gibson's ability to step up a level, according to Sami Mokbel of MailOnline: "With the likes of Alexis Sanchez, Mesut Ozil and Theo Walcott all likely to be involved at the weekend, Chelsea scouts feel the clash at the Emirates Stadium will provide them with a perfect opportunity to grade Gibson's progress.