MADRID, Jan 30 (Reuters) - Valencia midfielder Joaquin has said team morale has suffered since Ronald Koeman took charge as coach last November.'Ever since the boss took over things have got worse,' the Spain international was quoted as saying in Marca on Wednesday. 'Sometimes we have improved a little during a game, but it hasn't lasted long and that has sapped our confidence. 'The team is gutted, we are full of doubt and it is difficult to get out of a situation like this although we are the only ones who are capable of sorting it out.' He added that players were at a loss as to how to halt the side's dramatic downturn in form. Valencia have won just one of their 10 league matches since Koeman took over and they are now just five points above the relegation zone in 11th place in the table. The team were fourth in the league when the club decided to sack Koeman's predecessor Quique Sanchez Flores. Joaquin said that the team had been affected by the upheaval and by Koeman's decision to sideline three of the clubs most experienced players, David Albelda and Miguel Angel Angulo and Santiago Canizares. 'The team has been affected and it is obvious the team isn't working,' he said. 'It is an awful situation because they are players who have been at Valencia for a long time and they are our team mates. 'Because of our reputation and the players that we have we must get out of this but what worries us is that we want to but can't seem to be able to.' Valencia play Atletico Madrid at the Calderon in the return leg of the quarter-finals of the King's Cup on Wednesday. They hold a 1-0 advantage after last week's first leg.