Porto have been knocked out of this season's Champions League.
They lost to Russian side FC Krasnodar on away goals in the third round of qualifying.
Meanwhile, last year's semi-finalists Ajax are narrowly through to the final play-off round.
They dodged a bullet by beating Greek Champions 5-4 on aggregate.
Elsewhere, Celtic have also been eliminated from the Champions League.
They conceded four times to CFR Cluj of Romania in a wild match in Glasgow.