Harrington continued this winning form into 2003 winning the first event of the 2003 season at the BMW Asian Open in November 2002. Following Harrington's success in 2001 and 2002 he was invited to, and won, the 2002 Target World Challenge, an unofficial event in the USA hosted by Tiger Woods, whilst this is not a PGA Tour event it marked Harrington's first win in the United States. His winning form continued into the new year winning the Deutsche Bank Players Championship of Europe in May 2003. With these two wins Harrington finished third on the 2003 European Tour Order of Merit.