Jose Mourinho believes Liverpool's assault on the Premier League will open the door for Porto when the pair meet in the Champions League later this month.
Jurgen Klopp's team were drawn against the Portuguese side in the last 16 of Europe's premier competition last year and the Reds ran riot away from home, winning 5-0 in Estadio do Dragao on February 14.
The return leg at Anfield was a non-event as Klopp's men ground out a goalless draw to breeze into the quarter-finals for the first time in nine years.
Having drawn Porto for the second successive season in the Champions League, a presentable opportunity at another semi-final appearance awaits Liverpool.
We're building up to Jurgen Klopp's pre-Southampton press conference HERE
However, former Manchester United boss Mourinho thinks Klopp's squad might be too preoccupied with their attempts to win a first league title in nearly three decades.
And Mourinho, who won the Champions League with Porto in 2004, reckons his former side will be a different proposition to the one that was soundly beaten last term.
"Porto have a chance to win and go through," said Mourinho at the ANTF Forum this week, as reported by Portuguese media.
Pep Guardiola makes huge Liverpool admission as Premier League title race intensifies
"Compared with last season, I think (Porto coach) Sergio Conceicao will ask himself questions about what happened in order to do something different this time around.
"The tie is open and what happened last year, I believe, can play for Porto in both games.
"Liverpool have absolutely fantastic individual quality, but they are disputing the league title which means that they will not rest players in the previous game or between the two games."
The Reds host Porto on April 9 with the return leg coming eight days later in Portugal.
