Thieves broke into cars parked by football fans at Sheffield Wednesday's game at Hillsborough on Saturday.
A coat and sports bag was stolen from a car in Claywheels Lane, Hillsborough, while the Owls were playing Derby County and another car on the same street had a window smashed but nothing was taken.
South Yorkshire Police said two cars were broken into on Wardsend Road during the game.
A purse and tools were stolen from one and an iPod and e-cigarettes were taken from the other.
Anyone with information should call South Yorkshire Police on 101.