need a better No.1 goalkeeper. That is painfully obvious. was culpable for yet another goal in Monday night's Premier League 3-1 win against relegation-threatened Wolves.

With the Blues minutes from taking a 1-0 lead into half-time, Sanchez dropped Matheus Cunha's corner-kick for Matt Doherty to poke in from close range. He could, and should, have punched the delivery clear as he did with a previous corner.

Former Chelsea midfielder Emmanuel Petit said on Sky Sports: "I don't know why he didn't punch the ball. He tried to catch it. He should have punched it. If you want to be secure, to guarantee it, just punch the ball. Don't take the risk."

Jamie Carragher added: "He should just punch it. We keep getting signs that Sanchez is a Premier League goalkeeper - but maybe for a team in the bottom half of the table and not a top team."

It is the fourth time this season the Spaniard has made a mistake directly leading to a goal, after slip-ups against Brighton and Manchester United. He was also blamed for goals conceded against and

Only Ipswich's Arijanet Muric has made more errors leading to goals (five). It is only fair to mention that he has had impressive performances too. His penalty save secured the 1-0 win over Bournemouth in September and earned him the man of the match award.

But while Sanchez has the best save percentage in the league (78 per cent), that does not paint an accurate picture of his struggles, and the fans are losing faith in him. Understandably so.

After one early catch in the second half against Wolves, home fans in the goal behind him at Stamford Bridge sarcastically cheered. It is clearly time for second-choice Filip Jorgensen to get a go.

Maresca has defended Sanchez repeatedly and said in October: "If Robert makes a mistake, it's not Robert's problem. It's my mistake because I asked that from Robert. I am very happy with Robert and the way he is playing, building from the back."

But this rate of mistakes is untenable, and it threatens to cost as they compete for a spot in next season's Champions League. It is an area of glaring weakness.

It is time for back-up Filip Jorgensen, 22, to get a go in the Premier League. He has shown promise and actually has more clean sheets for the Blues this season - five in 13 games compared to Sanchez's four in 20.

He is a long-term project but if the Dane is not seen as an improvement on this current version of Sanchez then perhaps neither of the pair are good enough for the Londoners.

A world-class shot-stopper would make a gigantic difference to this Chelsea team, as would the addition of an authoritative centre-back. It is highly unlikely a new keeper will be brought in in what remains of the January transfer window.

In the summer is another matter entirely. The Blues of course have a plethora of players to pick from in goal, but Sanchez is a sellable asset, Kepa Arrizabalaga - on loan at Bournemouth - has no future in west London and Marcus Bettinelli, 32, is truthfully only there to fulfil the homegrown quota.

Djordje Petrovic, on loan at Strasbourg, has shown promise and a decision will need to be made on him in the summer. While highly-rated Belgian teenager Mike Penders will also join from Genk in July but is only 19 and has very little senior experience, suggesting a loan away is inevitable.

Chelsea have plenty of keepers on the books but none of them are close to the quality available at rivals Liverpool (Alisson Becker), Arsenal (David Raya) or Manchester City (Ederson) right now. Even Tottenham (Guglielmo Vicario) have a better No.1.

Sanchez is not to the level Chelsea aspire to be at, as harsh as that seems. Maresca must decide whether he thinks Jorgensen can be. If he can, it is time to play him more regularly in the Premier League.

If he's unsure, the Italian needs to immediately be lining up a summer signing who is good enough. Maybe Leicester's Mads Hermansen will be that man given the Foxes look set for a return to the Championship.