Niki Terpstra (born 18 May 1984 in Beverwijk) is a Dutch racing cyclist with UCI ProTeam Omega Pharma-Quick Step. He is the silver medal winner of the team pursuit in the 2005 UCI Track Cycling World Championships, together with Levi Heimans, Jens Mouris and Peter Schep. With a 4th place in the Three Days of de Panne followed by a 14th place at the 2008 Tour of Flanders, young Terpstra showed signs of considerable talent. In 2009 Terpstra won the 3rd stage in the 2009 Critérium du Dauphiné Libéré, gaining the yellow leader jersey at the same time.

Iljo Keisse (born 21 December 1982 in Ghent) is a Belgian racing cyclist. He rode part of the 2010 season for UCI ProTour team Quick Step and is currently racing for them.

Together with his teammate Matthew Gilmore, he won three Six-day races in 2005–2006: Grenoble, Ghent and Hasselt. After his victory in the 2008 Six Days of Ghent, both his A and B samples tested positive for cathine and a diuretic which has been used to mask the presence of doping agents. He was fired by his team Topsport Vlaanderen-Mercator on 11 January 2009. He joined the John Saey-Deschacht-Huyandai team in May 2009.

On 2 November 2009, Keisse was cleared of any wrongdoing, with investigators finding that the positives were not the result of intentional doping and likely resulted from a contaminated dietary supplement. On 7 July 2010, the Court of Arbitration for Sport upheld an appeal by the World Anti-Doping Agency and reinstated Keisse's ban. He is credited for the 11 months he already sat out, meaning he was eligible to return to competition in August 2011. In November, the CAS' decision was overturned by the Belgian Court of Appeals, allowing Keisse to ride the 2010 Six Days of Ghent. Keisse remained banned in Belgium until 27 January 2012, but re-signed with Omega Pharma-Quick Step for the 2012 season.