Antoine Griezmann being a Barcelona success is important to head coach Ronald Koeman.

Barca are preparing to face Granada in an away Copa del Rey quarter-final on Wednesday.

They are favorites to win the competition after Atletico Madrid and Real Madrid crashed out against lower-league opposition.

Griezmann scored twice and set up another as Barca won 4-0 at Los Carmenes in LaLiga last month.

Ahead of their latest meeting in the cup, Koeman praised the World Cup winner for his turnaround in form, which was partly sparked by that outing.

He has five goals in his last seven games, including the winner in Sunday's 2-1 home win over Athletic Club.

"All season Antoine is working well," Koeman said at his pre-match news conference.

"[He has done] what a player has to do, which is help the team to the maximum. 

"With Antoine there have been moments when he has been scoring and those when he hasn't scored, but they are phases that any footballer goes through, we have all experienced it. 

"Now he is very good and that is important to me. We want to get the most out of each player in the squad."

Griezmann has seven goal involvements in his last six games at Los Carmenes and, prior to his star showing in the last meeting, had netted just three times in his first 16 LaLiga appearances this season.

Barca have five straight away wins in LaLiga, four of which have come with clean sheets. It is their best run under Koeman, who hopes they can carry that form into the cup.

"It is a different game because it is the cup and they are always different games from the championship," said the Dutchman.

"Also I think that both they [Granada] and we have played many games – they have had even more. 

"Do not forget that at the start of the other game we had quite a few complications in playing our game. We expect a difficult game in which we have to be very focused."

Koeman would not go as far as saying the Copa del Rey was now his top priority over LaLiga.

But he concedes it is the most likely route to domestic silverware with Atletico Madrid sitting 10 points clear with a game in hand atop the table.

Koeman added: "The cup is not more important than the league, but it is true that it is closer [to being won] because there are fewer games left. 

"It is not normal for Atletico Madrid to get so many points, they are very strong. In the league we can only wait for them to fail. We have lost many points at home that cannot be dropped.

"I don't give more importance to Wednesdays game than to the weekend [against Real Betis], but we want to keep winning and get through this tie to be in the semi-final. 

"Squad rotation depends on the physical condition of the players. It is a vital match, but if there is a player who is not physically well, he will not play."