Dan Ballantine and Ian Tesmond had just one setback on the way to their first title. They did one better the second time around.
The Hinsdale Central seniors repeated as doubles champions, capping an undefeated season with a 6-4, 6-4 victory over Highland Park's David Zak and Zach Brint in the final.
"You just have to block all of that out and concentrate on the next point," Ballantine said.
Hinsdale Central finished a point behind New Trier, which won its 19th state championship.
South celebration: Tim Kopinski's runner-up finish was the highest for a south suburban player since 1950.
The Stagg junior, who was seeded 3-4 along with 2009 champion Blake Bazarnik of Stevenson, gave Stineman everything he could handle in a second set that was played at a high level.
"Overall, I'm happy how I played," said Kopinski, who did not reach the quarterfinals last year. "It's a big improvement over last year and I hope to be better next year."
The Vanderbilt-bound Bazarnik had a difficult day.
He was defeated 6-1, 6-0 by Stineman in the semifinals before defaulting in the third-place match with heat exhaustion after splitting the first two sets with Deerfield's Jason Brown.
He was taken to Northwest Community Hospital as a precaution and released shortly thereafter.
Bazarnik and Stineman had split their two matches this season, with Bazarnik winning most recently.
"Blake and I are basically even," Stineman said. "Of all the matches we've ever played, it's probably right around .500. Sometimes it's his day and sometimes it's mine. It really came down to the big points. In the quarterfinals yesterday and both matches today, I was able to win the big points."