London - Chelsea have signed teenage Croatian midfielder Mario Pasalic from Hajduk Split for an undisclosed fee on Wednesday.
Pasalic was due to join up with Jose Mourinho's squad for their first pre-season training session later on Wednesday after arriving at the Premier League club's Cobham head-quarters.
The 19-year-old is regarded as a dynamic young talent and has already featured in his country's Under-21 team.
He was also named in Croatia's provisional 30-man World Cup squad, but didn't make the final cut for the tournament in Brazil and has yet to make his senior international debut.
"I am very happy because I am now a Chelsea player," Pasalic told Chelsea's website.
"I am very impressed by the training ground and I must thank everybody at Hajduk. This is now a new start in my career.
"I am a central midfielder, my favourite player is Frank Lampard, and so I am very happy to be a Chelsea player."
The German-born youngster came to Chelsea's attention after enjoying a fine first full season in senior football during 2013-14.
He scored 11 times in 36 appearances in all competitions and helped Hajduk to a third-place finish in the Croatian league.