What was the name of the championship series Robert Seguso and Vasek Pospisil  were involved with?
Robert Seguso Robert Arthur Seguso (born May 1, 1963) is a former professional tennis player from the United States. A doubles specialist, he won four Grand Slam men's doubles titles (two Wimbledon, one French Open and one US Open). He also won the men's doubles Gold Medal at the 1988 Olympic Games in Seoul, partnering Ken Flach. Seguso reached the World No. 1 doubles ranking in 1985. He won a total of 29 career doubles titles between 1984 and 1991.
International Open Series The International Open Series (often referred to as Pontins International Open Series or PIOS for sponsorship purposes), was a series of snooker tournaments that ran from the 2001/2002 season until the 2009/2010 season. It was originally called the Open Tour but was renamed in 2005/2006.