According to Darren Lewis in the Mirror, Chelsea are "rivalling" Inter for the consistent Candreva—currently playing with Italy at Euro 2016 under incoming Blues manager Antonio Conte—but his arrival at Stamford Bridge would not "threaten" current star midfielder Willian.
The 29-year-old has netted at least 10 goals in each of his last three Serie A seasons and would be a very useful addition given he can play a variety of positions down the right flank—including at wing-back—and also on the left or in the centre, per WhoScored.com.
Candreva's familiarity with Conte's methods would also make him an excellent signing as he could fit straight in to what will likely be a much-changed system at Stamford Bridge under the Italian.