As if the ugliness of the 120 minutes wasn't enough there was disgrace as Rangers and Celtic fans invaded the pitch at Ibrox, writes Tom English.

Flares were thrown as supporters from both sides spilled onto the pitch after Celtic's 4-2 win on penalties.

Celtic knocked Rangers out of the Scottish cup after winning a penalty shootout 4-2 following a goalless 120 minutes, before fans from both clubs invaded the pitch