The Reds are winless in their last four Premier League games to give Chelsea FC an outside chance of securing a top-four finish.
Liverpool FC have drawn with West Brom, Everton and Stoke City in three of their last four Premier League games.
The Merseyside outfit slumped to a 1-0 loss to Premier League champions Chelsea FC at Stamford Bridge last weekend.
Jurgen Klopp’s side booked their place in the Champions League final despite a 4-2 loss to Serie A giants AS Roma in the second leg of the last four.
Former Spurs midfielder Jenas believes Liverpool FC risk playing themselves into some poor form ahead of the showpiece in Kiev.
“As a player the worst thing you can do is look at a big game in isolation when it is one or two matches away and think ‘should I give 100% this weekend, because I might pick up an injury and miss it?” Jenas told BBC Sport.
“If you do that, you inevitably play badly which sends you down a whole different road. Your confidence goes a little bit and, before you know it, the big match is next and you are thinking about how to get back into some form rather than staying at the top of your game.
“That is the problem that Liverpool’s players are facing at the moment.
“What happened against Chelsea was not a one-off, either. In the Premier League, some of their results and performances in the past few weeks have been poor, which is why they have not maintained their push for second place.”
Liverpool FC finished in fourth place in the Premier League table last term to secure a return to the Champions League.
The Reds lost 3-1 to La Liga giants Sevilla in the Europa League final in 2015 in Klopp’s first full season in charge.
The Merseyside outfit haven’t won the Premier League title but finished in second place in 2002, 2009 and 2014.
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