The worrying performance given by Sevilla against Leganes was on Jorge Sampaoli's mind as much as the result with two key fixtures next up for the Rojiblancos.After being held to a second consecutive 1-1 draw, Leicester City await Sevilla for the second leg of their last-16 Champions League tie, on Tuesday night."If we give this performance again, we will have a lot to worry about in the Champions League," the coach remarked to reporters."These games, where your opponents punish you for each error, are much tougher and if we cannot improve our control of matches then Tuesday's game will be very difficult."With these two draws, we have not lost for eight matches, but we must be more culpable for our own actions during the 90 minutes."After the Foxes, Sevilla then face Atletico Madrid in a key LaLiga clash which the Argentine admits he must attend do in a busy week for the Andalusians."The reason is that we have lost our footballing instinct and it's preventing us from controlling match situations to suit ourselves," Sampaoli asserted."The solution is to continue to be pragmatic, [Leicester] are very fast and anxious to win whereas today [Leganes] were very orderly and imposed themselves on us."We have to think in parallel about two different teams, two different but important matches, and prepare our best performances."