Complex sentence: For long spells it looked like Roscommon would create the shock of the summer and led by 3 points with less than 10 minutes to play however Mayo used all their experienced and know how to fall over the line and win by a single point.
Split into simpler sentences: For long spells it looked like Roscommon would create the shock of the summer and led by 3 points with less than 10 minutes to play. However, Mayo used all their experienced and know how to fall over the line and win by a single point.