Ronald Koeman declared he must be the wrong coach for Barcelona if he cannot be allowed to criticise the team for falling short of required standards.

The Dutchman is approaching six months in charge of the Camp Nou giants and he expressed frustration on Thursday when his team needed extra time to see off third-tier minnows Cornella in the Copa del Rey.

Miralem Pjanic and Ousmane Dembele missed penalties, and that factor particularly stuck in the craw for Koeman, a spot-kick expert in his playing days.

Koeman said his players needed to "have more responsibility", adding: "You can't miss two penalties as Barcelona players."

Those forthright comments have come in for plenty of scrutiny in Spain, and Koeman was asked about their impact on his players when he spoke on Saturday, ahead of a LaLiga trip to face Elche for which Lionel Messi is suspended.

"I am not going to lie. I say what I see," said the former Everton, Netherlands and Ajax boss.

"If you are a Barca player, you have to be demanding. I criticise them with respect. I'm not going for anyone, I want to help them, but if we play against Cornella with all due respect and we are not able to win in 90 minutes, I have to say what I see.

"If not, bring in another coach."

Koeman pointed to Barcelona's dismal overall penalty record this season, including the Supercopa semi-final shoot-out against Real Sociedad.

He said: "Every player can miss a penalty but to miss seven out of 12 is too much.

"The number one to take penalties is Leo [Messi] but if he's not there on the pitch to take it we must have other players to have the responsibility to score from the penalty spot.

"Yesterday and today we trained that to improve."

Sunday's clash with Elche will be a seventh successive game away from Camp Nou for Barcelona, including their Supercopa games last week.

Barcelona have struck on strong form in LaLiga and had moved up to third place heading into the weekend.

However, leaders Atletico Madrid stood 10 points ahead of them, with their rise driven to a large part by the goals of Luis Suarez, the striker Barcelona allowed to leave in the close season.

Suarez, third on Barcelona's all-time scorers list, has 11 goals in 14 league games for his new club.

Asked if Barcelona are missing Suarez, Koeman said: "I don't like answering that. You only ask me when he scores. He is a great player, I wish him the best of luck, but the decision has been made."

Koeman would love to bring new players to Barcelona, but the club's finances have been heavily hit by the coronavirus pandemic.

Any possibility of a new club president launching his tenure with marquee recruits was scotched when elections, due to take place this Sunday, were delayed.

"My position is known: we lack people, but the economic situation of the club is an influence," Koeman said. "I think we all think the same. If no one arrives, I accept it and we continue the same, but if we want more we must sign."