Japan struck first and were ahead as the match entered the final half hour, but a two goal barrage by the Ivorians spoiled the day as the Samurai Blue come away empty-handed in the 2-1 loss.
Maya Yoshida has suffered a knee injury and is set to miss the rest of season.
Maya Yoshida helped Japan to a 4-2 win over New Zealand today.
Maya Yoshida scored his first Premier League goal in a 3-1 loss to West Ham United.
Southampton XI vs Sunderland in the Capital One Cup: K. Davis (c), Chambers, Yoshida, Hooiveld, Fox, Cork, Reed, S. Davis, Ramírez, Lee, Rodriguez. ---SUBS---Gazzaniga (GK), Clyne, Ward-Prowse, Lallana, Isgrove, Stephens, Gallagher.
Southampton have shown interest in Lyon's defender Dejan Lovren.