PSG will have to wait another week for the debut of $60 million addition Javier Pastore, and its first win of the French Ligue 1 season.
Jonathan Pitroipa scored with two minutes remaining and Rennes tied PSG, 1-1, on Saturday to keep the rebuilt Paris club winless after two matches.
Qatar Sports Investments dumped over $100 million into PSG this offseason but has yet to produce a win. Pastore, the most notable of the signings, failed to make his debut after joining the club last weekend.
PSG lost its opener 1-0 to Lorient with about $40 million in new acquisitions unable to produce a result, and Kevin Gameiro's 73rd-minute goal wasn't enough Saturday.
Rennes defeated promoted Dijon 5-1 last week and trails two-win Toulouse, Caen and St. Etienne in the standings.
Toulouse 2, Dijon 0
Toulouse, France - Umut Bulut and Paulo Machado scored in a 13-minute stretch of the second half and Toulouse defeated promoted Dijon, 2-0, on Saturday and leads France's Ligue 1 after two weeks.
Bulut scored in the 71st minute and Machado followed from the spot in the 84th to give Toulouse six points from two matches. Toulouse beat promoted Ajaccio, 2-0, last week. Dijon has lost its first two matches, as it fell 5-1 to Rennes last week.
Caen 2, Sochaux 1
Montbeliard, France - Romain Hamouma and Pierre-Alain Frau scored as Caen beat Sochaux, 2-1, on Saturday in France's Ligue 1 to remain perfect two games into the season.
Hamouma opened the scoring in the 13th and Frau doubled the lead on 65 minutes for the visitors. Caen beat Valenciennes, 1-0, in its opener last weekend.
Ryad Boudebouz scored for Sochuax, which tied Marseille 2-2 last weekend, in stoppage time.
St Etienne 1, Nancy 0
Saint Etienne, France - Sylvain Marchal scored three minutes from time and St. Etienne remained one of three teams perfect after two games with a 1-0 victory over Nancy on Saturday in France's Ligue 1.
St. Etienne beat Bordeaux last Sunday, 2-1, to open the season with a victory. Nancy is winless, as it tied Lille last week 1-1.
Lorient 1, Bordeaux 1
Lorient, France - Carlos Henrique scored in stoppage time as Bordeaux escaped Lorient with a 1-1 draw Saturday in France's Ligue 1.
Yann Jouffre scored in the 82nd minute for Lorient, which beat PSG 1-0 in its opener last week, but Henrique split the points. Bordeaux, which lost to St. Etienne 2-1 last week, is winless after two games.
Lyon 1, Ajaccio 1
Lyon, France - Lisandro Lopez scored with seven minutes remaining as Lyon was able to escape with a home draw against promoted Ajaccio on Saturday in Ligue 1 in France.
Ajaccio lost its opener 2-0 to Toulouse last week, but Frederic Sammaritano scored in the 58th minute to surprise Lyon, which answered late to steal one point and remain unbeaten after a season-opening win over Nice.
Valenciennes 0, Brest 0
Valenciennes, France - Brest earned a 0-0 draw at Valenciennes on Saturday in France's Ligue 1, as it posted its second straight tie to open the season.
Valenciennes lost 1-0 to Caen last week and earned its first point this season with the result.