<text>  Ronald Koeman takes on Jose Mourinho this weekend well aware of how desperate his old friend will be to put Chelseas Champions League disappointment behind them. Southampton face the unenviable task of trying to stifle a Blues side not only chasing the Premier League crown but wounded by Wednesdays European exit to Paris St Germain. Chelsea failed to capitalise Zlatan Ibrahimovics first-half sending off, with the 2-2 extra-time draw at Stamford Bridge ending their hopes of a memorable treble. Ronald Koeman says he is looking forward to facing old friend, Chelsea boss Jose Mourinho this weekend . Mourinho takes questions during his press conference at Chelseas Cobham training ground on Friday . Striker Diego Costa attempts an overhead kick during his sides 2-2 draw with PSG at Stamford Bridge . Chelsea captain John Terry tussles with PSG striker Zlatan Ibrahimovic during the Champions League tie . Chelsea players surround referee Bjorn Kuipers as he prepares to send off Ibrahimovic in the first-half . It was not the first underwhelming Blues performance of late, but Koeman does not expect such displays to necessarily work in Saints favour this weekend. I dont know when its a good time to face them, the Dutchman said. Its always a difficult time. Its a big team, a strong team with some great players and of course they are very disappointed after the last Wednesday result. If you play 60 minutes against 10 players, you dont expect that final result and maybe a little bit more under pressure. They fight after the League Cup title and after that, not the most important one, they fight for the title. They need a win after a disappointing result but they will give a reaction you normally expect as a manager. Ahead of this match, Mourinho brashly declared that Chelsea would win the Premier League - the kind of comments Koeman takes with a pinch of salt. The pair worked together under Louis van Gaal at Barcelona in the late 1990s and retain a close relationship to this day. I know him very well, Koeman said. Its a good friend and great coach and a very successful manager. It was nice in our period in Barcelona and its always nice to meet Jose and we look forward. When I was with Jose the assistant of Van Gaal in Barcelona in 98 and 99, it was a long time ago and its not always easy to know what will happen in the future. At that time he was very ambitious as a coach and he had good coaches to see what he needs to be a successful coach. Mourinho second from left and Koeman far right worked together at Barcelona during the 1990s . Current Manchester United boss Louis van Gaal far left was manager of Barca during this time . Saints right-back Nathaniel Clyne skips over the challenge of Crystal Palace forward Dwight Gayle . Crystal Palace striker Yaya Sanogo is challenged by Saints defender Ryan Bertrand at St Marys . Man management is key to Mourinhos success, so too that Koeman is enjoying this season. Saints have tailed off slightly recently but returned to winning ways against Crystal Palace last time out, before making the most of a 10-day break by jetting off on a mid-season jaunt. Koeman took this side on a bonding trip to snowy Switzerland, foregoing sun loungers and training for Nordic skiing and ice hockey. I saw some players skating and I dont think it was good for their confidence, Koeman said, smiling. It was something totally different and we choose Davos because of the relationship between Southampton and Switzerland - Katharina Liebherr the owner and the chairman is there. It was totally different to lying on the beach on Dubai. If they like to go to Dubai, they can go in the summer. We did some activities which was great, some players were skeptical before going but everybody was happy with what we did. It was a good week but playing football is totally different. Always you know if you stay together the whole day and do some different activities there is more time to talk. Players had free time and you see characters of players, difficulties, but they did a great job because they achieve everything what we did and it was a great atmosphere over there. Koeman recently took his Southampton players on a skiing trip to bond in Switzerland . Southamptons Italian striker striker Graziano Pelle takes a tumble while skiing in Switzerland . Jose Fonte said the trip had brought the squad together and taken some of the stress of the season away . Southamptons players during their recent trip to the Swiss Alps over the FA Cup weekend . 