After spending two seasons at the French club, he decided to move on to Spanish club Málaga CF where he played 94 games and scored a total of 22 goals in four seasons. In 2003, he was transferred to Atlético Madrid for €3 million on a five-year contract, a year before his Málaga contract was due to expire, in what he viewed as a potentially good career move. In his first season with the club, he played 26 matches and scored two goals although in the following season, he was relegated to the substitutes' bench and only scraped together eight games in 2004.
Manchester City
In January 2005, Musampa moved to Manchester City of the Premier Leagueon loan after becoming a fringe player at Atlético. In his first six months, he scored three goals in 14 games; his first City goal was a "spectacular volley" in the last-minute which was the winner against Liverpool and gave Stuart Pearce his first win as City manager, while he also scored goals against Aston Villa in a 2-1 victory, and an equaliser against Middlesbrough which wasn't enough to help City qualify for the 2005–06 UEFA Cup. In June 2005 Musampa agreed up to stay at Manchester City for a second season. The Dutchman started the new season as a regular first team player, but lost his first team place in December, after which he played irregularly, with the majority of his appearances being in central midfield. At the end of the 2005–06 season he returned to Atlético.
On 30 August 2006, he signed a three-year contract for Turkish club Trabzonspor on a free transfer. After being released from Trabzonspor, Musampa trained with English Premiership side Sunderland for a period but ultimately was not signed by the club. After returning to the Netherlands, Musampa trained with Eredivisie outfit AZ. In November 2007, he signed a contract at the club for the rest of the season, but he was released from his contract on 1 January 2008.
After an unsuccessful trial with Toronto FC of Major League Soccer he signed a two-year contract with K-League side FC Seoul in March 2008. His stay in South Korea was brief, as he made just three league appearances and two League Cup appearances for the club before the two parties agreed to mutually terminate his contract in June 2008.
In September 2009 the winger went on trial with French side FC Metz, scored one goal in a friendly match, but the club did not sign him in the end. He eventually announced his retirement from professional football.
International career
Musampa was the member of Dutch U20 team at 1995 FIFA World Youth Championship, playing all three group matches, the team did not proceed past the group stage. Musampa went on to be a key player for the Netherlands Under-21s and achieved 25 caps, scoring 8 goals, he is currently in the top 10 players for both caps and goals at that level. His form whilst on loan at Manchester City earned him a call-up to the Netherlands squad to play Romania and Finland but he played in neither game.