Huddersfield have been boosted ahead of the kick off by Danish midfielder Philip Billing signing a new three-year contract.
Billing, 21, who made 24 Sky Bet Championship appearances last season, will stay with the newly-promoted Terriers until at least the summer of 2020, while the club has the option of a further 12 months.
"Philip is such a big talent, he has everything you want from a modern midfielder,'' Wagner.
"I'm very excited to see how he copes with Premier League football. Philip has had a good pre-season and I think it is now the time to show everyone what he is capable of on the highest stage.''
Billing, 6-foot-6, joined Huddersfield's academy aged 16 from Danish club Esbjerg and after making his debut in the final home game of the 2013/14 season against Leicester, has gone on to make a total of 42 appearances.