Kepa Arrizabalaga behind Willy Caballero and now Chelsea’s THIRD-choice goalkeeper after latest error vs Southampton, Tony Cascarino claims

Tony Cascarino believes Kepa Arrizabalaga has become Chelsea's THIRD goalkeeper after his latest error in the 3-3 draw with Southampton on Saturday.
The Spaniard made a hesitant challenge on Che Adams, leaving the Saints forward to fire the ball into the empty net for Saints second goal of the thriller at Stamford Bridge.
It was the latest in a long line of errors made by the 26-year-old, who was drafted into the starting XI due to the injury suffered by Edouard Mendy while on international duty.
Mendy's signing earlier this summer dropped Kepa down to Chelsea's second-choice keeper, but former Blues striker Cascarino believes the Spaniard is now even behind veteran glovesman Willy Caballero!
“He’s gone from No.1 to No.2 goalkeeper, and after yesterday’s performance he’s probably number three now," said Casc on Sunday's Weekend Sports Breakfast.
“He won’t even make the bench now as [Willy] Caballero will be No.2.
“I’m a bit surprised [Frank Lampard] chose to play Kepa; he doesn’t fancy Kepa and it’s obvious.
“Caballero has done very little wrong, but because they’ve paid such a high fee for a player they need to justify playing him to give him an opportunity to perform.”
Chelsea must move quickly onto Tuesday's Champions League opener against Europa League champions Sevilla at Stamford Bridge, with boss Lampard aware of the scale of improvements required.
The Blues manager has maintained, however, that formation switches are not to blame for Chelsea's leaky defence.
"I don't think it's conceding goals in relation to the shape of the team, that's something for me to think about all the time," said Lampard.
"I'm not dead-set on playing that formation, there were loads of great things from the 4-2-3-1.
"But it is something we need to continue working on, because it is a change."
Lampard also has to make the decision whether to continue with Kepa against Sevilla or recall Caballero to the side for Chelsea's European opener.
Furthermore, Mendy's injury could also keep him out next weekend's trip to Manchester United as well, which would mean even more playing time for one of the Blues' backup glovesmen.