Racing Metro 22 vs. Munster 17
The biggest shock of the weekend came in Paris, where Racing ended a two-year wait for a home win by knocking off the two-time champions.
Munster started brightly, and when Paul O'Connell crashed over the line, they appeared to have raced into a 15-point lead. However, the TMO had other ideas, correctly ruling it a knock-on, and Munster took the foot off the peddle, letting Racing back into the game.
Munster were their own worst enemies. Committing numerous errors against a pack as strong as Racing's will punish you.
Simon Zebo scored a magnificent individual try to put Munster 17-16 in front with five minutes remaining, only for Munster to concede two penalties.
In such a competitive group every point counts, meaning Munster are on the brink of disaster.
Edinburgh 0 vs. Saracens 45
Having struggled to score tries in recent weeks, no one expected Saracens to put up a cricket score in Scotland, but they were relentless on Saturday.
The club has made no secret of their ambitions, and this was a serious statement. Their pack is good enough to take on anyone, so if they can continue to unleash their backs, they will be contenders.
In true Saracens style, they ground Edinburgh into submission in the first half, before killing the game in the second.
Charlie Hodgson is relishing playing behind the Sarries pack, and in-form, he has the skills to cause havoc.
Edinburgh are as good as out, while Munster cannot afford another slip-up. Expect them to unleash all their frustrations on Edinburgh in Thomond Park next Sunday, where a bonus point is required.
In previous years, Racing have had their minds elsewhere after opening-day defeats, but they will be motivated when they travel to London next weekend. Two titanic packs will go head to head, so don't expect free-flowing rugby.