Celtic, Rangers and the Champions League wild card to watch as Villarreal threaten £40m bounty

The Champions League knockouts just never fail to deliver, do they?

The dust is settling on another dramatic night on the continent as the first two teams booked their place in the semi-finals - and there one was considerable shock.

While most observers were glued to the thriller between Real Madrid and Chelsea at the Bernabeu, there was another Spanish side producing a huge upset.

When Villarreal edged out Bayern Munich in their first leg clash in Spain last week, it was widely believed the Bavarians would run amok at the Allianz.

But last season's Europa League winners are not to be trifled with under former Arsenal manager Unai Emery.

Despite going behind to a Robert Lewandowski goal, Emery's side rallied to find and equaliser two minutes from time, one that proved fatal for Bayern.

It was a goal that propelled them into what will likely be a last four tie against Liverpool, who lead Benfica 3-1 from their own quarter-final first leg.

If they were to somehow go all the way, it could be bad news for this season's Scottish Premiership winners.

The title race has carried an added incentive in the form of an automatic Champions League group stage and the £40m reward it brings for whoever crosses the line first this season.

And, six points clear of Rangers with fives games left, it very much looks like Celtic will do so.

Villarreal's progression to the semi-final has had some supporters fretting on social media and it's because, should they pull off an incredible, odds-defying feat and win the tournament, the Scottish champions' group stage place would come under real threat.

The Champions League winners, of course, are given a place in next season's tournament.

Most of the time, however, the winners will have