I know their was a lot of us who were skeptical of his signing due to his performances at PSG. But if what the last 30 mins vs Liverpool and today have shown so and if he keeps it up he definitely will pose a big challenge to Alba and be worth the fee we bought him for.
He's a great alternative to Alba if he gets injured or needs rest or if he loses his shit towards another player and gets sent off like what God Serena said.
None of them will accept the bench for extended periods of time though.
Time to bench Alba
That's how it is when you have quality depth. Better that than not having quality depth and competition. It's all about competing. They are both under long term contract, so they have no choice.