Ricardo Costa's goal gave Porto a 1-1 draw with Inter Milan in the Champions League first knockout round, first leg.
Holders Porto will face Premier League leaders Manchester City while former European champions Ajax Amsterdam will meet Manchester United in two glittering Europa League Round-of-32 ties following Friday's draw.
Manchester United earned comfort in the unfamiliar surroundings of the Europa League with a 2-0 win at Ajax on Thursday while their English rivals Manchester City fought back against holders Porto to also take control of their round of 32 tie.
Images from the Champions League matches played across Europe on Tuesday.
Real Madrid fashioned a stunning comeback to beat Manchester City 3-2 in a classic Champions League match with a last-gasp Cristiano Ronaldo strike in their Group D opener on Tuesday.
Holders Porto crashed out of the Europa League after a 4-0 thumping at Manchester City completed a 6-1 aggregate win for the English Premier League leaders on Wednesday.
Holders Porto thrashed Sporting 5-2 to reach the semi-finals of the Portuguese Cup on Tuesday.
Champions League title holders Porto face a struggle to qualify for the knockout phase after Paris St Germain held them to an uninspired 0-0 draw on Tuesday.