Dimitrov has looked one of the freshest players at these finals and that, combined with his all-round game may have been the key to his success. I started the match well.
Grigor Dimitrov of Bulgaria serves to Vaclav Safranek of Czech Republic on day three of the U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. In the second set the dynamic changed again, with Dimitrov taking risks and playing efficiently.
The break of serves kept coming as both players traded the next two games before the seventh seed restored a semblance of order to proceedings by holding for a 3-1 lead.
Having come from behind to beat Federer in Saturday's semifinal, Goffin had every reason to be confident and could have gone ahead.
Dimitrov won all five of his matches at the O2 Arena to become the first player to win the elite tournament on debut since 1998, when Alex Corretja of Spain triumphed in Hanover. That was made clear by the decision he made to not play Paris and pursue the number one ranking, he is not confident his body can handle much more of this.
"I have no words I can not describe how I'm feeling, so much joy, so much happiness".
That break ultimately gave Goffin the chance to serve for the set - an opportunity he grasped without conceding a point.
Grigor Dimitrov vs David Goffin: Live score updates from ATP World Tour Finals
Both finalists were first-time qualifiers for the season-ending tournament and while many ticket holders might have booked them in anticipation of watching Roger Federer or Rafael Nadal, the two newcomers provided a fitting end to the ATP season.
With the pendulum suddenly swinging, Goffin took advantage of two double faults from the racquet of Dimitrov, smashing a forehand victor past him to seal the break in the next game.
"I don't know what to say".
Down 0-3, Jack saved a crucial break point hitting a fast forehand, then he started to be more consistent and solid and broke back his opponent. "I'm just so humbled to be able to play the final tomorrow". The resilience that allowed Sock to come from behind and win the first set was nowhere to be seen in the second.
It was too close to call but two Sock double faults helped Dimitrov break for 5-3.
By now, Sock had won more games than Dimitrov had relinquished in his previous two games combined. In the second frame, he raced into the lead and this time held on to push the match into a decisive third set, where Sock saved three match points but could not stave off the inevitable. "But I will try something different for sure, yeah".