The former England captain, who is attached to the same management company as the Scot, was in the Royal Box.
Murray is bidding to become Britain's first men's singles champion at Wimbledon since 1936. He is facing Nadal for the fifth time in a Grand Slam, hoping to avenge a drubbing in 2008 when the Spaniard went on to win the title.
Tendulkar among sports greats in Wimblon royal box
England denied as ball crosses line off bar
England coach Capello's father was Nazi prisoner
Who was better: Federer or Roddick?
Morgan helps England go 2-0 up on Australia