Complex sentence: Rollers also have a bitter rivalry with Mochudi Centre Chiefs, and matches between the two sides over time eclipsed the Gaborone Derby as the biggest football encounter in Botswana due to both clubs' following and success.
Split into simpler sentences: Rollers also have a bitter rivalry with Mochudi Centre Chiefs, which has eclipsed the Gaborone Derby in recent years. This match has earned its right to be called the biggest football encounter in Botswana due to both clubs' following and success.