Misc: what is a belted galloway?

Questions

who is the only person in history to acheive a 'gold slam', i.e. the four grand slams and the olympic gold all in one year?

who was nicknamed 'muscles'?

acclaimed as the best swede to step on court since bjorn borg, and arguably the best serve-and-volleyer of all time?

who was the first ever person to test positive for a banned substance at the wimbledon championships?

what was bjorn borg's nickname?