SAN JOSE, Calif. -- Canada's Milos Raonic had a more pressing concern than tennis to think about Friday.
Raonic, the top seed and two-time defending tournament champion, had 14 aces in a 7-6 (0), 6-3 win over Uzbekistan's Denis Istomin to advance to the SAP Open semifinals.
But instead of looking ahead to the semis or staying to watch the late match between third-seeded Sam Querrey and Colombia's Alejandro Falla, Raonic's mind was on his stomach.
"Get a good meal. I'm hungry. It's late," said the Thornhill, Ont., native. "I'll start thinking about that (Saturday). Tonight, I'm thinking about food and sleep."
Raonic will next face Querrey, who outlasted Falla 6-3, 4-6, 7-5.
Meanwhile, John Isner advanced to the semifinals for the first time in his career, rallying in a first-set tiebreaker before overpowering Xavier Malisse 7-6 (8), 6-2 behind his booming serve. The bone bruise in his right knee that forced him to drop out of last month's Australian Open is no longer an issue, and apparently neither is his confidence.
"It's not something I'm going to just try to kick a serve in," Isner said. "I'm going to go for it."
The highest-ranked American saved two break points on his serve in a lengthy first-set tiebreaker, relied on his big-finish forehand for two breaks in the second set and never let his strongest stroke slip during a quick 68-minute match. He will play Saturday against fourth-seeded Tommy Haas, who beat wild-card Steve Johnson 6-4, 6-2.
Isner finished with 10 aces and no double-faults and made 67 per cent of his first serves. He improved to 5-2 in his career in San Jose. His previous best finish at the tournament played on a hard court in the home of the NHL's San Jose Sharks had come in 2008, when he lost in the quarter-finals to Guillermo Garcia-Lopez.
"If I serve well," Isner said, "I can be in the match against anybody in the world."
After two wins to advance to the semifinals, the remaining field could give Isner tougher competition. And so far the tournament has belonged to the hard-hitting headliners.
Neither Isner nor Malisse faced -- nor forced -- a break point in the first set until the tiebreaker, and Isner never faced one after that. The six-foot-nine American, ranked No. 16 in the world, kept the rallies short and the time between points even shorter and relied on his serve in the most critical moments of the match.
Malisse took a 3-0 lead in the tiebreaker before Isner smacked a return on the baseline that sent the Belgian backpedaling for a backhand that landed in the net to tie the score 5-all. Both times Malisse earned a set point, he couldn't solve Isner's serve, including a match-high 138 m.p.h. ace out wide.
Isner finally flicked a forehand from the baseline at the feet of a charging Malisse on his second set point. Malisse netted the in-between backhand, and Isner pumped his fist all the way to the bench.
"I just tried to hit my biggest serves," Isner said. "I feel like when I am serving out a set or serving out a match, I'm up a break, I feel like that's when my sense of urgency is the best. Essentially, I don't want to hit a ball besides my serve."
After the tiebreaker, he hardly did.
The only other drama came three games later, when Isner challenged a called ace by Malisse that was overruled. Isner later went ahead 15-40 and forced another backhand in the net for a break and a 2-1 lead that had the American screaming "Come on!"
Isner earned another break and cruised comfortably on his serve. On match point, he served out wide and put away an easy volley with Malisse well off the court.
After dropping the first two meetings, Isner has won the last three against Malisse. He's also starting to regain his rhythm after stumbling late last year, leaving Australia with a nagging knee and looking rusty earlier this week.
Isner had lost to Thomaz Bellucci to send the U.S. and Brazil to a deciding fifth match Sunday, when Querrey sealed the victory for the Americans by beating Thiago Alves indoors in Jacksonville, Fla. Isner hadn't played on the ATP World Tour since a two-set loss to fellow American Ryan Harrison in the second round in Sydney on Jan. 9.
Since losing in the round of 32 in the U.S. Open last August, Isner entered San Jose 3-7.
"It's a gradual thing, and winning cures a lot of issues for me," Isner said. "Mainly with confidence and being comfortable on the court, and that's what I feel like I'm building toward."