Why Pete Sampras emotional breakdown against Jim Courier in 1995????

Pete Sampas' coach Tim Gullikson was diagnosed with brain cancer the previous year. Pete trying to bolster him to stay afloat and not give into the disease was trying to win as many matches and do well. Whenever he did well Tim's spirit seemed to lift. At the Aussie Open, down two sets to Jim Courier someone shouted 'do it for your coach'. All the emotions he had been holding in burst through. It was an emotional release. He cried during points, he sobbed on changeovers but he won that match. Spare a thought though for Jim. He was a gentleman and although disappointed was genuinely happy and concerned for his friend.