It's a penalty, simple.
I've said this on the Caf before but as a fan of football and rugby (union), the comparable quality of the refs is laughable ..... BUT it could be helped a lot by bringing in TMOs (video refs).
I've been watching the rugby Test Matches today/last couple of weekends and the contentious decisions are right time after time after time partly because the officials are good but also because they use the TMO if it's an important decision and they're not sure.
So, today, the ref just stops play and says to the TMO "can you check the challenge and see if it was a penalty". The watch is stopped, the TMO would take a couple of minutes then come back with a decision.
- it doesn't take ages
- it doesn't impact on the 90 mins (watch stopped)
- it means majority of key decisions are right (it's not perfect, Ireland game today showed that)
- it stops the focus being on refs and keeps it on the game
- the fans love it ... apart from getting the right decision, it adds a bit of suspense. Tennis, rugby (x2), cricket... they all like it
It wouldn't be perfect (the other sports have more 'black and white' decisions) but better, much better.
Football is the biggest sport in the world with billions of pounds sloshing around and it's years behind other sports in making the most of technology that would make the sport better.