Former world No. 1 Greg Norman spoke of his pride at bringing "free agency" to golf as his fledgling LIV Invitational Series got underway just north of London on Thursday.

The breakaway series, bankrolled by $250 million from Saudi Arabia's Public Investment Fund (PIF), is the richest event in golf's history, but has sparked a bitter power battle.

Norman it was the culmination of a 30-year plan.