Sevilla coach Quique Sanchez Flores admits his players aren't fit enough.
Sevilla lost 1-0 to Atletico Madrid on Saturday.
Sanchez Flores later conceded: "There is a lot of work because there are many things to do. We are going to recover the players we have injured, as many as we can.
"Get those we have playing in shape, who can be much more fit and from there see if we can compete better.
"We would have liked to find a much better balance between defence and attack in the first half. After the break we thought it was convenient to leave the first five or ten minutes to make the changes and we were very unlucky to concede the goal in the first minute. The changes were going to be made anyway.
"With the changes we have been better. We have been settled, circulating the ball, reaching the opposite area. The expulsion, which should have favored us, hurt us because it brought us disorder and in that disorder Atlético de Madrid got the three points."