Chelsea are the favourites to sign Kerim Alajbegovic from Bayer Leverkusen, according to The Telegraph.
The 18-year-old attacking midfielder is said to be priced at £30 million.
Alajbegovic featured for Bosnia-Herzegovina at the just-concluded World Cup.
The teenager scored against Qatar last month during the group stages.
In total, Alajbegovic started in three of their games, including the last-32 defeat to co-hosts United States of America.
Chelsea are reportedly the most likely to land the deal amid interest from Juventus.