Rayo vallecano isn't in the right form to hold in to that position firm as top 4~
Do you mean Rayo Vallecano has no many quality players to defend the top 4?
You aren't wrong, if we compared their squad with Atletico Madrid or Barcelona, Rayo Vallecano squad seems not as strong as them. Although players' quality cannot guarantee to win in the match, mostly the team who have more quality players that have a bigger chance to win.
~just like that as athletico may not have the ability to score and earn much points against them.
Not sure what you mean. But Atletico attackers are strong enough. They should have the power to beat Rayo Vallecano. Moreover, the upcoming match will be at Atletico home. Atletico players are probably to have more motivation to secure 3 points.