Jack Sock celebrates defeating Germany's Alexander Zverev in the men's single semifinal match at the ATP Stockholm Open tennis tournament in Stockholm on Saturday Oct. 22, 2016.
Jack Sock celebrates defeating Germany's Alexander Zverev in the men's single semifinal match at the ATP Stockholm Open tennis tournament in Stockholm on Saturday Oct. 22, 2016. Soren Andersson Associated Press
Jack Sock celebrates defeating Germany's Alexander Zverev in the men's single semifinal match at the ATP Stockholm Open tennis tournament in Stockholm on Saturday Oct. 22, 2016. Soren Andersson Associated Press

Blue Valley North grad Jack Sock advances to fifth ATP World Tour final

October 22, 2016 3:42 PM