EFL fans have been left baffled over Portsmouth’s goalkeeper substitution.

Keeper Nicolas Schmid was forced off after suffering a first half injury.

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And he was replaced by deputy Ben Killip, with the pair sharing an embrace as they switched over.

It was an eye-cathcing sub as Schmid and Killip bore a striking similarity with one another.

They both have curly blond hair and beards, prompting confusion for viewers at home.

One reacted saying: “I swear Portsmouth just bought on a stunt double for their keeper. Absolute doppelganger.”

Another added: “Should have just swapped them at half time without anyone knowing.”

A third wrote: “Bit unfair cloning your starting GK, Pompey.”

And another commented: “Had me questioning my sanity.”

The incident took place during Portsmouth’s 0-0 draw with Southampton in the South Coast derby.

Shortly afterwards the match was interrupted by a pitch invader, who made it as far as the halfway line and appeared to gesture towards the away fans.

Saints also aimed a cheeky dig at their rivals by unveiling a provocative tifo before the match, showing James Beattie celebrating a goal against Pompey in 2003.