Evans and Jones have had quite the history over the last couple of years.
While they were training together they claimed to be as close as brothers.
Now the two are bitter rivals who hate to even acknowledge the other one.
Let's take a look on what brought these two to where they are today.
In 2009, Jon Jones began training with Greg Jackson's camp.
Jones, just 22 at the time, was already 9-0 in his short MMA career.
At the time Jones may not have seemed like a threat to anybody at the gym, but Rashad Evans has said he was uncomfortable with the decision to let Jones in.
Jackson on the other hand claimed everybody, including Evans, was fine with letting Jones join the team.
Jones may have lost his first fight under Jackson, but has since finished every other opponent he's faced.
Despite losing the UFC light heavyweight title in 2009, Rashad Evans found himself back in title contention the following year.
Evans defeated both Thiago Silva and long time rival Quinton "Rampage" Jackson to earn a title shot at Mauricio "Shogun" Rua.
After Rua was forced to sit out thanks to injury, Evans chose to wait for his title shot instead of taking a fight.
During this time Jon Jones was continuing to build his resume as he defeated veterans Brandon Vera and Vladimir Matyushenko.
At UFC 126, Jon Jones met fellow rising star Ryan Bader.
Bader came into the fight 12-0 and was arguably Jones toughest test at the time.
Jones easily defeated Bader by submission in the second round.
The night got even better for Jones when he was asked to step in for teammate Rashad Evans to take Mauricio Rua for the UFC light heavyweight title.
At first Jones and Evans claimed they would never face each other if Jones won the fight.
But things quickly changed when UFC 128 rolled around.
It took Jon Jones two and a half dominating rounds to capture the UFC light heavyweight title from Mauricio Rua.
On what was suppose to be the greatest night of his career, Jones was interrupted by Rashad Evans following the fight.
Although both men were respectful, they made it clear that they were going to put their friendship aside and face each other for the title.
In preparation for the fight with Jon Jones, Evans made the decision to leave Jackson's MMA.
Although Evans was humble at first, tensions rose overtime as Evans went back and forth with Jones and Greg Jackson.
The feud caused Evans to join the Blackzilians.
Since joining the Blackzilians, Evans has been 2-0.
Evans and Jones were originally scheduled to meet at UFC 133.
But a hand injury forced Jones out of the bout.
Tito Ortiz stepped in and faced Evans, losing by TKO.
Jones would go on to make his first title defense against Quinton "Rampage"Jackson. Following the fight Jones was interrupted by Evans who once again was set as the number one contender.
Although the trash talk continued between the two, Evans injured his hand before they could meet and was replaced by Lyoto Machida.
Jones went on to beat Machida by second round submission.
After the two were scheduled to meet in 2011, Rashad Evans and Phil Davis were set to meet at UFC on FOX 2.
If Evans picked up the win, he would once again be the number one contender for the UFC light heavyweight championship.
Evans out wrestled Davis to earn a unanimous decision victory.
Unless history repeats itself, Evans and Jones will finally meet at UFC 145.
The two former teammates have grown into bitter enemies over the course of the past year.
Many believe if there is anybody that can stop Jones rise, it's Evans, one of the fighters that knew him best.
But Jones has been so dominant despite only being 24 years old.
How will the end? We'll just have to wait and see April 21, 2012.