The former defender added: "I don’t think Mikel would have gotten away with ignoring bringing in a striker again. It seems like everyone wanted a striker this summer, and Arsenal weren’t the only ones, we've seen a lot of forwards signed by clubs this summer.
"It’s always a little bit of a gamble, and it dragged on for a bit with Gyokeres, but I like him as a player. I think he’s got a dimension to him that really suits how we play.
"And only time will tell whether he gets the goals, but they're all gambles, centre-forwards. If they don't score goals, it's a failure. It's as simple as that.
"Then we need to see how he fits in. There's been a lot of criticism over the last few years with Haaland, that he doesn't do this and he doesn't do that, but he's a proven, pure goal scorer. He gets his fair share and all the criticism about the rest of his game goes out the window.
"But not all centre-forwards are like that, they’re not all just about the numbers. Gyokeres can offer a bit of both, he can be an all-round contributor. He can definitely develop as a player under the coaches at Arsenal."