The day is here and we have the live stream for this match as Andy Murray (3) faces Tomas Berdych (5) in the Round Robin of the 2012 Barclays World Tour Finals at 8:45 a.m. ET. 

Neither player has won the Barclays ATP Championship in their careers. 

However, Andy Murray is having a great 2012 season, sort something like a LeBron James type season. Murray has won a Grand Slam tournament (U.S. Open), he won a gold medal at the 2012 London Olympics and could now wrap up the season with the biggest trophy of them all. 

He has struggled in the Barclays ATP Championship. Murray has two semifinal appearances under his belt in his five years participating in the tournament. He was there in 2008 and has not returned since his appearance in the semis in 2010. 

His opponent, Berdych of Czech Republic, has been here before with his most successful appearance coming in last season's championship. He cruised until the semifinals where he matched up with Jo-Wilfried Tsonga and was eliminated. 

This is his third consecutive ATP World Finals appearcance and will have the tough task of beating a tennis player that has finally risen to the occasion. 

Murray has the home field advantage as the championship will take place in the O2 Arena in London, England. 

Roger Federer is the defending 2011 champion.

This match will immediately follow the Men's Doubles match between Mirnyi-Nestor vs. Lindstedt- Tecau

Click here for the live stream of the match between Murray and Berdych.