Jamie Carragher believes Manchester City boss Pep Guardiola might spring a surprise when his side face Chelsea on Saturday.
Chelsea have been brilliant since boss Antonio Conte switched to a 3-4-3 system, winning seven league matches in a row and conceding just one goal in the process.
And former England and Liverpool defender Carragher, speaking on Sky Sports, suggested that Guardiola will be particularly keen to win the tactical battle this weekend.
Carragher said: “I think Guardiola will be desperate to get one over Chelsea and the system and set-up that they are using, because he’s been the manager who we’ve been talking about systems and doing different things.
“It’s now Antonio Conte who has done something, not that we didn’t expect it because he has done it before, but it is different to what we’ve seen.
“I’m sure Guardiola will have something up his sleeve and will do something a little bit different.
“I think it will be a fascinating game to look at tactically with what the two managers try and do.
“It’s a real big test for both managers and teams of course, but certainly for this Chelsea system.”
Third-placed City are one point below Chelsea and are unbeaten in six matches in all competitions.