To say Jack Sock is brimming with confidence may be an understatement.
The 21-year old American, ranked No. 72 in world, became the first player to reach the quarterfinals on Wednesday at the BB&T Atlanta Open.
Sock told the media he is feeling comfortable on the American hard courts after he defeated a qualifier in Michael Venus of New Zealand, 6-4, 6-2.
"Obviously the summer is going pretty well so far," admitted Sock. "I won some matches at the French. Wimbledon was a great showing for me. Newport winning three matches and two matches here so far, so confidence is probably the highest it has ever been."
Sock may be confident, but he isn't resting on his laurels.
He stopped by the practice courts on his way back to the hotel following his victory to work on his serve.
"It was just to tune up a little bit," said Sock. "I need to make sure it is on point for the next match."
In the other early match, No. 4 seed and Sock's doubles partner, Canadian Vasek Pospisil defeated Illya Marchenko of Ukraine, 7-5, 6-3.
Seventh-seed, Yen-Hsin Lu won his opening round match out on Court 3, 6-4, 6-4 over American Alex Kuznetsov.
Sam Querrey took to the court for his second round match against Dudi Sela in front of best crowd of the week.
Sela had dispatched Atlanta's Donald Young in round one and had his sights set on knocking out another American. Sela got his wish.
Querrey picked up his game to start the second, but Sela again scored a break to go up 3-2.
The American then broke back, but it didnt seem to worry Sela as he returned the favor and broke right back to go up 4-3.
The rest of the match stayed on serve and the Israeli player has reached his fourth quarterfinal in 2014.
"I tried to play a lot of long rallies and keep the ball in play," revealed Sela. "I played one terrible game and he didn't play his best, but I'm happy."
In the other second-round match Wednesday night, Lukas Lacko defeated Denis Istomin 5-7, 6-1, 6-4.
In doubles action, the team of Santiago Gonzalez and Scott Lipsky won by walkover when Matthew Ebden had to withdraw due to a right wrist injury.