 Complete the following phrase:  Relations between the clubs reached a new low in 1988 following Neil Simpsons brutal challenge on Ian Durrant at the time regarded as one of Scotlands biggest emerging talents which almost ended his career, caused him to miss almost three years of football and forced him to adjust his playing style to compensate for his damaged knee ligaments. That incident took place during a league match a few weeks before the second of three hard-fought Scottish League Cup finals between them. Some Aberdeen fans took to singing distasteful songs about Durrants injury as well as the 