Albion boss Sami Hyypia has branded the tackle which has made Kazenga LuaLua a doubt for Charlton's visit tomorrow a potential leg-breaker.
LuaLua hurt his right ankle in a challenge by Swindon's former Albion development squad defender Raphael Branco in Tuesday's Capital One Cup tie at the County Ground.
Hyypia refused to comment after the match but has spoken out after seeing a picture of the incident.
Argus photographer Simon Dack captured the moment (above) when Branco caught LuaLua well above the ankle, with the ball two feet away. Referee Andrew Madley did not even award a free-kick.
Hyypia said: "I think that could have been a leg-breaker but the referee makes his decisions, how he sees things, and we can only hope that he sees things right.
"I saw a picture this morning. In that picture the ball was almost behind the player and he stepped on Kaz's ankle.
"I didn't see it properly (at the time). Somebody was standing in front of me, so I didn't know how much of the ball he (Branco) got, but that picture looked very bad.
"We will have to see how Kazenga is tomorrow. Hopefully he will be fit and able to play."