Confidence Quote by Jack Sock
“When you're No. 8 in the world, then you start losing some matches, I think it was the first time in my career my confidence went down, and from there it was a downward spiral.”
“When you're No. 8 in the world, then you start losing some matches, I think it was the first time in my career my confidence went down, and from there it was a downward spiral.”
