Derby County have signed Czech Republic striker Matej Vydra for a club record fee that BBC Radio Derby understands to be around £8m.
The 24-year-old, who was on loan with Reading last season, has joined from Watford on a four-year deal.
"It's a strong team with a very good manager," Vydra told BBC Radio Derby.
"They have ambition to be in the Premier League and I come with this as well because I know how good it is to play in the top league in the world."
Vydra first moved to England on loan from Italian side Udinese at the start of the 2012-13 season.