Here's a short story:

(CNN) -- Five-time winner Roger Federer opened his U.S. Open account Monday with a straight sets win over Santiago Giraldo in New York. 

Despite surrendering his serve three times, the 30-year-old Swiss enjoyed a relatively comfortable match against the Colombian, ranked 54 in the world, winning 6-4 6-3 6-2 on the Arthur Ashe Stadium court. 

Leading 5-1 in the opening set, a number of uncharacteristic errors from Federer saw him squander a double-break advantage before he finally rallied to win 6-4. 

The second and third sets were more straight-forward, though the world number three will be concerned about his winners-to-unforced errors ratio -- he finished with 36 winners and 35 unforced errors. 

"It was quite up and down, getting used to the conditions," admitted Federer, in quotes carried by usopen.org. 

"I don't think I've ever played my best in the first round but it's important to come through them and come up with a good feeling." 

Home favorite Mardy Fish was ruthlessly efficient as he easily dispatched Germany's Tobias Kamke 6-2 6-2 6-1. 

However fellow American Ryan Harrison was not so fortunate. The 19-year old lost out to big-serving Croat Marin Cilic, 6-2, 7-5, 7-6 (8/6). 

Seventh seed Gael Monfils ruined the U.S. Open debut of Grigor Dimitrov of Bulgaria with a battling 7-6, 6-3, 6-4 victory, while Czech Tomas Berdych, the number nine seed, beat French qualifier Romain Jouan 6-2, 7-6 (7/4), 6-1. 

Elsewhere, French 13th seed Richard Gasquet trounced Ukrainian Sergiy Stakhovsky 6-4 6-4 6-0, Serbian Janko Tipsarevic ousted France's Augustin Gensse 6-2 7-5 6-0, while Czech Radek Stepanek beat Germany's Philipp Kohlschreiber 6-4 6-1 6-3.  (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: What sport are they playing?
Guess: tennis
Confidence: <appropriate level of confidence in this guess>

Question: What event was it?
Guess: the U.S. Open
Confidence: <appropriate level of confidence in this guess>

Question: where?
Guess: in New York.
Confidence: <appropriate level of confidence in this guess>

Question: Who is the five time winner mentioned?
Guess: Roger Federer
Confidence: <appropriate level of confidence in this guess>

Question: Who does he defeat?
Guess: Santiago Giraldo
Confidence: <appropriate level of confidence in this guess>

Question: how did federer describe the conditions
Guess: "It was quite up and down, getting used to the conditions,"
Confidence: <appropriate level of confidence in this guess>

Question: How did he describe his playing
Guess: "I don't think I've ever played my best in the first round but it's important to come through them and come up with a good feeling."
Confidence: <appropriate level of confidence in this guess>

Question: who is the home favorite?
Guess: Mardy Fish is
Confidence: <appropriate level of confidence in this guess>

Question: who is the american?
Guess: Ryan Harrison
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: how old is he?

19