The 12th seeded Rojer and Tecau, who rallied from a set down to upset top seeded Henri Kontinen and John Peers in the semi-finals, needed just 86 minutes on a sunny Arthur Ashe Stadium court to add the US Open championship to the Wimbledon title they won in 2015.
His season had already provided several unforgettable chapters but Andy Murray saved the best to last as he eclipsed Novak Djokovic 6-3 6-4 to claim his first ATP World Tour Finals title and rubberstamp the year-end top ranking on Sunday. Against a man who has so often been his nemesis, Britain's golden boy Murray produced a relentless display to claim a ninth title of a year which included a second Wimbledon crown and Olympic gold in Rio.
It is the first time the final match of the season will decide who is ranked number one.