The Tottenham striker has looked sluggish this season following a long World Cup campaign. He was expected to miss the match against the Swiss but came on in the second half during the friendly.
"It's difficult for Mauricio Pochettino. I love him as a manager, but he should have said 'I am not using you, you need time off to rest, I am not going to use you for the next two or three games, so go on holiday, freshen up, because I want you for the rest of the season.'
"But he has had a couple of weeks off after the World Cup, come back into training and then straight into games. He's gone straight into Premier League games with high intensity, and he is nowhere near that level with his lack of training and conditioning."