Racing 92, Northampton Saints and Connacht were all winners in Sunday's European Rugby Champions Cup action.
Wing Teddy Thomas put more pressure on Stade Francais coach Heyneke Meyer as Racing 92 came out on top in the Paris derby.
An early red card was decisive as Bordeaux-Begles suffered their second defeat of the Top 14 season.
It was another game and another win for Lyon in Top 14, where Castres were defeated by Toulouse on Saturday.
Racing 92 dominated the second half to beat Pau before La Rochelle were beaten by Toulon at Stade Mayol.
Despite seeing their try line breached for the first time this season, Lyon maintained a 100 per cent start to the season in the Top 14.
Toulon and Agen each won in the Top 14 on Sunday, with Racing 92 unable to complete a turnaround while Montpellier were outplayed.
Toulouse won the Top 14 last season but they have been beaten in each of their first two matches at the start of the 2019-20 campaign.
There were shock wins for Bayonne and Bordeaux-Begles as the Top 14 returned for the 2019-20 season on Saturday.
Munster, Racing 92 and the Ospreys will take on holders Saracens in the pool stage of the 2019-20 European Champions Cup.