"We played well. The players have shown commitment, desire, passion and created chances". He did not want a new defender to help with a switch to a back four from the three-man alignment preferred by Antonio Conten and neither was he keen on another striker, despite the struggles last season of Alvaro Morata.
He was also involved in the move to win the penalty, as Pedro started the attack, allowing Jorginho to feed it into Ross Barkley with a perfectly-weighted pass and the England worldwide flicked it into Marcos Alonso's path to earn the penalty.
Huddersfield, too, can take heart from the performance, certainly in the first half. You can't do that against Chelsea because they will hurt you, and that's exactly what they did.
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MF Ross Barkley, 7 - It's clear that Barkley is fully fit and the qualities he once displayed for Everton were very much in evidence as he played with composed intelligence in midfield. "We did it better in the second half, there was more space and time". The football didn't improve until the Italian delivered his team-talk, though - and they performed like a new team after the restart.
The Cottagers, promoted after winning the play-off final at Wembley, had produced a positive first half, but went behind when Jeffrey Schlupp drilled in a left-foot shot on 41 minutes. Ultimately, Kepa Arrizabalaga, Chelsea's new £72m goalkeeper, had little to do. His distribution was inaccurate, he failed to command his area particularly well nor provide the backline with much confidence behind them.
"If you want to get something out of these games, you have to be at your very best", said Wagner.
Pereyra, who scored five goals in 18 league appearances for Watford last season, volleyed home from a corner by Jose Holebas in the 35th minute before doubling the lead with an unmarked finish in the 54th.
This game was against a side who will be challenging for a Champions League place - at least - so is not the most representative test of Huddersfield's aims. "We kept them away from our goal and as I said they scored out of nothing".