In first-round Davis Cup action, Roddick helped the US defeat the Czech Republic, winning his singles matches against Ivo Minář and Tomáš Berdych.Roddick reached at least the semifinals of his next two tournaments.At the first ATP Masters Series tournament of the year, after beating No. defeat Spain and advance to the Davis Cup semifinals, winning his lone singles match against Fernando Verdasco. Roddick also announced that he would withdraw from the Monte Carlo Masters, citing the injury.
After Wimbledon, Roddick began working with a new coach, tennis legend Jimmy Connors.
In his first event with his new coach, Roddick reached the final of Indianapolis, before losing to good friend and fellow American, James Blake.
2 Andre Agassi, 6–1, 6–7, 7–6, along the way, and reaching the Wimbledon semifinals, where he lost to eventual champion Roger Federer in straight sets. Roddick's hard-court record in 2003 included his first Masters Series titles—coming at Canada and Cincinnati—and his only Grand Slam title. At the Tennis Masters Cup in Houston, he defeated No. 4 Guillermo Coria of Argentina, before losing to Roger Federer in the semifinals. He also became the youngest American to hold this rank since computer rankings were started in 1973. 1 ended the following February, when Roger Federer ascended to the top position, after winning his first Australian Open; the 2004 Australian Open would be the only time in Roddick's career that he was the No. Two weeks later at Wimbledon, Roddick was upset in the third round by British hopeful Andy Murray.
At the US Open, Roddick rallied from two sets down and a match point in the semifinals to beat David Nalbandian of Argentina, 6–7, 3–6, 7–6, 6–1, 6–3. By the end of the year, at age 21, he was ranked No. This loss caused Roddick to fall below the top 10 for the first time since 2002.
In the finals of a Grand Slam for the first time since Wimbledon a year prior, Roddick played No. 4 Ivan Ljubičić of Croatia, 6–4, 6–7, 6–1, but lost in the round robin to No.
1 Federer, 6–4, 6–7, 4–6, in a tough three-set battle, despite holding three match points in the second-set tiebreaker.Roddick and the Moroccan battled for five hours, with the fifth set (21–19 in favor of Roddick) at the time the longest fifth set in a Grand Slam tournament during the open era, at 2 hours and 23 minutes. In June, Roddick advanced to his first Wimbledon final, and after taking the first set from defending champion Federer, lost in four sets. At the 2004 Summer Olympics, Roddick lost to Chilean Fernando González, the eventual bronze medal winner, in the third round. There, he reached the fourth round, before being upset by unseeded and eventual finalist, Marcos Baghdatis.Despite a lackluster French Open, Roddick enjoyed success in the United Kingdom by winning Queen's Club, beating No. It is one of three times that Roddick defeated Federer in an official ATP tournament. Roddick was knocked out during the 2004 US Open in a five-set quarterfinal against another big server, Joachim Johansson. At the French Open, Roddick retired in the first round, after sustaining a foot injury during the match.This was his eighth season in World Team Tennis and the fifth team for which he has played. Roddick also won the Australian Junior Open, defeating Mario Ančić in the final. Men's Claycourt Championships, reclaiming the title he won in 20.He was also the 2015 Champion of the QQQ Champions Series; a feat that he repeated again in 2017. He won six world junior singles titles and seven world junior doubles titles, and won the US Open and Australian Open junior singles titles in 2000. Entering the pros in 2001 at the age of 18, Roddick quickly showed his promise when he defeated 7-time Wimbledon champion and world No. In 2004, Roddick saved fellow tennis player Sjeng Schalken and other guests (including close friends Ben Campezi and Dean Monroe) from a hotel fire. (He lost in 2003 to Agassi, and in 2004 to Tommy Haas.) At the Rome Masters in May, Roddick had match point in the round of 16 against Spain's Fernando Verdasco.Reaching the final, however, enabled Roddick to overtake Nikolay Davydenko for the No.