Jonas Olsson has told West Bromwich Albion to go shopping for a new striker.

On-loan centre-forward Romelu Lukaku is set to return to Chelsea.

Defender Olsson said: "Romelu has been massive for us. It's not realistic to think we keep him.

"Someone who scores 13 goals for a club like West Brom, with all respect, it's a great achievement.

"He'll be difficult to replace but that's the challenge."