Paris Saint-Germain have the best performances in the group so far and undefeated sit on the first position.
In the first three rounds they won convincing over the other teams in the group. They also have the best goal difference with 13 scored and only two conceded goals.
The French champions have won over Olympiakos in Piraeus, so they will start this match with confidence. PSG have also started good in the domestic Ligue 1 and without defeat are on the leading position. In the last league match they won 3:0 over Reims. For these good results in domestic league and European competition for sure have influence their striker Zlatan Ibrahimovic (9 goals in French league and 7 in Champions League). The striker Edison Cavani also have scored 9 goals in the league and 2 in UEFA Champions League. The defender Thiago Silva will be back after recovering from an injury.
Olympiakos have three points less than PSG and the only defeat they suffered was by the French champions. The Greek side won against Anderlecht away, and achieved four points in the matches with Benfica.
Olympiakos, similar as PSG, sit on the first position in the domestic league, without a single defeat. The striker Konstantinos Mitroglou is the top scorer in the team with 17 goals, including three in Champions League matches.
PSG are unbeaten 27 matches in all competitions at Parc des Princes. I believe that this statistic will continue after this match. Olympiakos are in good form, so I expect a high scoring match with at least three goals.