Progressing as group winners means Spurs will miss the best of the Champions League teams dropping down in to the Europa League for the knock-out stages.
"It is possible," he said on a potential clash with Porto.
"On a personal level I wouldn't like that. Our aim is to go all the way to the final and I wouldn't like that.
"I have tremendous gratitude to the club and I'm a great fan so hopefully that doesn't happen until the final."
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