Inter Milan team will not be able to win against Manchester City if they play a defensive strategy only. Manchester City is one of the strongest attacking teams in the world. The city's midfield and attack are very strong. And so it will be risky for Inter Milan if they decide to play only a defensive strategy.
Inter will have zero chance if they open up to Man City and their only chance is to defend, hope that City wont have their day and possibly score on counterttack.
Even though City is a big favorute here, everyone should keep in mind that its only one game where everything is possible so I wouldnt write Inter all together.
Playing defense doesn't guarantee that Inter Milan will win the game because Guardiola will play a different strategy and pressure his team to play attack at the start of the match so that it doesn't give a chance to defend, I'm sure Manchester City will play seriously against Inter Milan because of that I feel confident that manchester city will not miss another chance to win the CL this season.
The hope of all supporters is that Manchester City will get a treble winner and we know that their core squad of players will be ready for the final match later, my prediction is that Manchester City should be able to win with a narrow score, which is enough for them.