Chelsea have moved ahead of Paris Saint-Germain and Juventus in the race to sign AIK attacker Alexander Isak, a source close to the Swedish club has told ESPN FC.
The source said Chelsea had tabled a firm bid for the 17-year-old and were now considered favourites to land him.
"PSG have been in contact with AIK numerous times but there is no offer on the table right now," the source said.
"Inside the club, Chelsea are the favourites and have already proposed €11 million."
Last week, sources said negotiations over a move to French champions PSG for Sweden under-21 international Isak were under way and that AIK would hold out for around €15m.
Last week, reports in Italy suggested Juventus had offered €16m.
Isak scored 10 goals in 24 Allsvenskan appearances last season, and scouts from some of Europe's biggest clubs have flocked to Friends Arena in Solna to watch him in action in recent months.