The Cleveland Cavaliers will play the Chicago Bulls on Sunday in Game 4 of their NBA Playoffs 2015 series, with the Cavaliers surprisingly behind and under some serious pressure. Cleveland will know that if they lose today they will be on the brink of elimination, and they will be looking at today's game as a must-win.

Today's big game between the Bulls and Cavaliers will start at 3.30 p.m. ET and takes place from the United Center in Chicago, Illinois. The game will be available to watch live on TV on the ABC network or online through live stream via the link provided below.

Coming into Game 4 the Bulls are leading 2-1, having shocked the Cavaliers in Game 3. Derrick Rose and Jimmy Butler have gotten the Bulls ahead and if they can consolidate their good work today then they will be just one more win away from eliminating the favorites for this year's postseason.

After the Bulls won Game 1, LeBron James and the Cavaliers came out much more aggressively in Game 2 to claim a overwhelming 106-91 victory. Many believed that the Game 2 would spark a series of wins from the Cavaliers, however, that is not how things have turned out, and Rose and Butler responded immediately in Game 3 to put the Bulls back out in front.

The pair had shocked Cleveland by putting on 45 points together in the series opener, but they turned the heat up more in Game 3, combining for 50 points in total. Rose was the one who sparked the celebrations for the Bulls in Game 3, sinking a three-pointer just before the buzzer to claim the 99-96 win for Chicago and put them 2-1 up in the series.

Coach Tom Thibodeau has said, "That's his greatness. There are not many like him. As a matter of fact, there are not any that combine the speed, the quickness, the power and he is shaking the rust off."

LeBron James will know he will have to respond again today if Cleveland are not to move to the brink of elimination. He has had a long history in Playoffs basketball against the Bulls - most of it going heavily in his favor - and he will be hoping to square up the series with a road win today.

On the rivalry between James and the Bulls, Taj Gibson has said, "We've been seeing LeBron over and over, over the years. Every year we kept getting better and better, now you see Jimmy stepping up taking those shots he wouldn't take last year; that's big. Jimmy has grown so much, he's taking the big time shots Derrick doesn't want to take. I'm extremely happy for him."

Today's big Game 4 between the Cleveland Cavaliers and the Chicago Bulls will start at 3.30 p.m. ET and can be watched on TV on the ABC network or online through live stream by clicking here.