The French side won 3-2 against the tournament holders to put themselves in pole position to reach the last four but Pochettino is wary of the challenge that lies ahead in the return leg.
He told RMC Sport: "I am happy with the result, with the attitude of the team which found itself in difficult situations against the best team in Europe. We must congratulate the players for their sense of sacrifice. We are trying to repeat this kind of performance.
"When you win, it's always easier to explain your decisions, everyone thinks you made the right choices. The credit goes to the players, they are the main protagonists, it is their quality that must be highlighted.
"There were a lot of sacrifices tonight, but we still have one game, 90 minutes to play. The first leg is favourable but the return will be difficult as we know."
PSG were in a similar position in their last 16 tie against Barcelona - when they produced a tame second leg performance having stormed into a 4-1 advantage - and Pochettino has warned his team that they can't afford a repeat.
The Argentine coach said: "It's a totally different result from the first leg against Barca, the advantage there is as small as possible. We hope that our performance in the return will be better than against Barcelona, that's our desire."