Both Chelsea and Manchester United went into the FA Cup final knowing that only victory would save their season.One of the clubs would end the campaign trophyless after underwhelming seasons for both.United finished second to a fantastic Manchester City side but were dumped out of the Champions League in the last-16 by Sevilla.Whereas Chelsea finished in 5th, missing out of Champions League qualification.Win or lose, Antonio Conte’s future looked in doubt, while there would be immense pressure on Jose Mourinho if he ended the season empty-headed.Despite their league position, the bookies actually made Chelsea favourites to win in 90 minutes.And the prediction from the bookies looked spot on after just 22 minutes.Eden Hazard raced through after Cesc Fabregas’ pass before the Belgian was brought down by Phil Jones.Jones was last man and it was a certain penalty.But why was he only shown a yellow card?Conte and the Chelsea players asked for Michael Oliver to brandish a red.However, there are new rules that came into play last summer called ‘double jeopardy’.They stop a club being penalised by being reduced to 10 men and conceding a penalty.

THE 'DOUBLE JEOPARDY' RULE

And plenty of football fans - including Gary Lineker - were trying to explain to everyone else why Jones hadn’t been sent off.

Ah, that’ll explain it.

Just as well Hazard stuck away his penalty or there would have been plenty of very angry Chelsea fans inside Wembley.

And considering his shaky start, it might not necessarily be a bad thing that Jones was allowed to stay on the pitch...