Manchester City's rebuilding plans for new season have gathered momentum after they secured the services of Alvaro Negredo from Sevilla for around £20m. Negredo, who scored 25 goals in La Liga last season, will be confirmed as City's third signing of the summer – and their second from Sevilla – once he has completed a routine medical with the Premier League club.

The Spanish international has been a long-term target for Manuel Pellegrini, the City manager, who tried and failed to sign the 27-year-old while in charge of Málaga. With Sevilla keen for Negredo to move overseas, rather than join a potential rival in Spain – an offer from Atlético Madrid was flatly rejected – the path was cleared for Pellegrini to link up with a player who will fill the striking berth vacated by Carlos Tevez.

Negredo has agreed personal terms with City on a deal that will dwarf the relatively modest £1.7m a year he was earning in Spain. José María del Nido, the Sevilla president, made a point of highlighting the fact that Negredo "will sign the contract of his life" at the Etihad Stadium.

The Spain striker is following in the footsteps of Jesús Navas, the winger who completed a £17m move, rising to £21.5m in add-ons, from Sevilla to City last month. The Brazilian midfielder Fernandinho is the other significant piece of transfer business City have completed this summer.

Negredo was with Real Madrid in the early part of his career but he was unable to force his way into the first team. He joined Almeria in 2007 and two years later signed for Sevilla, where he scored prolifically, amassing 70 league goals in four seasons with the club. A member of the Spain squad who won Euro 2012, Negredo enhanced his reputation with a stellar season for Sevilla, that brought him to the attention of a number of English clubs, including Tottenham Hotspur.

"Manchester City are buying a great player, the top-scoring Spaniard in La Liga," Del Nido said. "This is a big deal for Sevilla, the second most important in our history after we sold Daniel Alves [to Barcelona], and the player will sign the contract of his life. Everyone should be happy; it is a great deal for all three parties."