Rory McIlroy back to No 1: Golf's official world rankings explained

How many of golf's world number ones since 1986 can you name?

Rory McIlroy’s return to number one golfer in the world turns a spotlight on the OWGR, writes Kevin Markham.

As Rory McIlroy regains his place as the No. 1 golfer in the world this week it is worth challenging readers of this newspaper to name the golfers who have reached this coveted position since the rankings were introduced in 1986.