If someone comes on and scores 2 goals to turn a game on its head in 10 minutes does it still not count? You can say it's not any indication of how he'd play over 90 minutes but it's unfair to dismiss it altogether because it was a decent cameo.
I'm talking about the case in point.
He came on for 10 minutes and held the ball up relatively well, but being that city were throwing everyone forward he was hardly under massive pressure to do so.
He did what was required and expected, that's all.