with the Guillain–Barré syndrome, and following treatment he spent a year in recovery before returning to play in a November 2001 Scottish Cup game. He played three league games for Celtic late in the 2001–02 season before he returned to Denmark. He signed on a free transfer for defending Danish champions Brøndby IF in the summer 2002, as one of the first signings of new manager Michael Laudrup. In his first year at Brøndby, he most famously suffered a gashed eyebrow in the November 2002 game against Farum BK, but played on wearing a bloody head bandage and scored four goals in Brøndby's 7–1 victory. He was appointed vice-team captain behind Per Nielsen, and Wieghorst won his second Danish Cup title in 2003. In May 2004, Wieghorst suffered a knee injury in the "New Firm" local derby against archrivals F.C. Copenhagen. He returned to the starting line-up late in the 2004–05 season in April 2005, and was a part of the Brøndby team that won The Double of both league championship and cup trophy. In May 2005, less than a month after his rehabilitation, he announced his retirement at the season end on 26 June 2005. International Wieghorst made his international debut for the Denmark national under-21 football team in October 1990, and played six games for the team until September 1991. He made his debut for the Denmark national team in August 1994, when he came on as a half-time substitute and scored the deciding goal in the 2–1 friendly match win against Finland. He was a part of the Denmark squad that won the 1995 King Fahd Cup, where he came on as a substitute to replace the injured team captain Michael Laudrup in the 2–0 final win against Argentina. During his injured first seasons at Celtic, Wieghorst's international career went on a hiatus. After his return to the Celtic team, Wieghorst became a mainstay in the Denmark national team from October 1997. He was selected to represent Denmark at the 1998 FIFA World Cup, and played three games at the tournament. Most remarkably, he came on as a substitute in the 82nd minute of the 1–1 draw with South Africa, only to be sent off three minutes later. In Denmark's ultimate qualification game for the 2000 European Championship, he scored in the 3–2 victory against Italy which secured Denmark's qualification for the main tournament. Having been brought