There are some out there who have already declared Manchester United EFL Cup champions. Jose Mourinho's side are massive favourites ahead of Sunday's final clash at Wembley against Southampton, after all.

It could be a significant landmark for the club, too. Securing silverware would make it official that Mourinho's reign at Old Trafford is heading in the right direction, while it is one of three trophies they can still potentially lift this season.

Claude Puel's men will have something to say about that, though. Southampton are hoping to lift their first major honour since 1976 and their first ever League Cup.

It won't be an easy task, Man United have only lost one match in their last 25 in all competitions and appear to be able to do whatever it takes to get results.

However, it may not all go their own way.

Here are THREE stats that point to a potential upset at Wembley on Sunday...

Southampton haven't conceded any goals in the EFL Cup

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Southampton's Maya Yoshida celebrate with Jose Fonte after the match
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The main reason Southampton have made it to Sunday's Wembley final is their ability not to concede goals. They have in fact reached this stage without letting in any, which is a quite remarkable feat considering they played four Premier League sides on their way to the final and had to take on a free-scoring Liverpool side twice.

While Maya Yoshida won't have his regular defensive partners Virgil van Dijk or Jose Fonte to call upon, it's a stat that must fill the whole squad with massive confidence heading into Sunday's showpiece. Keep one more clean sheet and the chances of lifting the trophy are massive.

To do that they'll have to counter Zlatan Ibrahimovic's march towards 30 goals for the season, though - the Swede is currently on 24, and that's no mean feat.

Six goals in five games for Gabbiadini

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Manolo Gabbiadini is in electric form and has shown in his two appearances for Southampton that he could be the calibre of striker they've been waiting on to add an attacking threat to their defensive prowess.

The Italian has scored three times in those two matches but before he made his move to the English Premier League he scored three in his last three for Napoli, including one in a Coppa Italia match.

That's goalscoring form that can impact cup finals and something Manchester United will have to be extremely wary of on Sunday.

Man United have conceded just one goal in their last six matches, but Danny Graham of Blackburn Rovers showed last week that they can be vulnerable, a slither of hope that Southampton must bring into the game.

Man United haven't won half of the last six head-to-head

Manchester United's recent form against Southampton is actually pretty patchy and that may be the biggest cause for confidence in the Saints camp.

Stretching back six games to 2014, Man United have won three of the last six fixtures with Southampton losing two and the other of course being a draw.

Perhaps crucially, both of Southampton's wins have come at Old Trafford where Manchester United were considered massive favourites. Perhaps that will play a factor psychologically for some players heading into the Wembley final.

If Saints can produce a performance similar to the one at Old Trafford just over a year ago when a Charlie Austin striker gave them a win then it could be a famous day in the history of Southampton.