German Bundesliga giants Borussia Dortmund have secured the services of Nigeria-eligible midfielder Carney Chukuemeka from Chelsea,
The 21-year-old initially joined Die Schwarzgelben from Stamford Bridge on loan in February , with the option of a permanent transfer included in the deal.
During his loan spell, the former Aston Villa played 17 games for Dortmund, scoring just one goal across the Bundesliga, UEFA Champions League and the FIFA Club World Cup.