Porto and Bayern Munich will have to make Champions League history to reach semi-finals

The Champions League quarter-finals will be concluded this week and on paper none of the scores are too disparaging – although Porto and Bayern Munich face ominous tasks to progress.

Porto conceded two away goals to Chelsea to lose their first leg 2-0, while Bayern Munich were beaten 3-2 at home to Paris Saint-Germain – the team they conquered in last season’s final.

While those scores seem reversible the away goals rule means that both sides face daunting evenings to progress.

Porto need a prayer as they look to overturn a 2-0 first-leg Champions League loss to Chelsea

Ben Chilwell (left) was on target as Chelsea scored two away goals in their quarter-final tie

Bayern Munich will have to dust themselves down after conceding three goals to PSG at home

Kylian Mbappe (centre) scored twice for PSG during their 3-2 win at the Allianz Arena

Porto must score at least three away goals to have any chance at progression and reigning champions Bayern’s best case scenario is a 2-0 win in Paris.

However, for both clubs to achieve they will have to produce historic performances.

For Porto, only once in the history of the Champions League has a team lost 2-0 at home in the first leg of a knockout tie and progressed.

The team that night was Manchester United as Ole Gunnar Solskjaer’s side overturned a 2-0 first-leg deficit to stun PSG 3-1 at the Parc des Princes during their last-16 encounter in 2018-19.

Marcus Rashford’s penalty saw Manchester United overturn a 2-0 loss to beat PSG in 2018-19

Rashford’s last-gasp goal saw United win the last-16 second leg 3-1 and progress on away goals

Marcus Rashford’s last-gasp penalty saw United win 3-1 on the night and progress via away goals having levelled the tie at 3-3 on aggregate.

The Red Devils are the only team in Champions League history to have achieved that feat in 18 attempts.

For Bayern, their mountainous objective would be a landmark moment in the competition. No side has ever progressed into the next round after losing 3-2 at home in the first leg. Eight teams have tried and failed beforehand.