Sunday's Rund um Köln may not be a premier race on the yearly calendar, but the German one-dayer holds a special significance for Tudor Pro Cycling sprinter Arvid De Kleijn , who will pin on a number for the first time since last October. The Dutch rider has endured an "incredibly hard few months" since last racing at the Tour de Langkawi, where he sped to two stage victories. There has been light among the darkness, with De Kleijn and his wife Céline welcoming their first child, Fye, in January, even if her birth didn't go 100% smoothly. "It wasn't an easy birth, and Céline couldn't get out of bed for a long time. It was mainly down to me, although I was actually scheduled to go on a training camp with the team. The team said they didn't think that was right, given the situation and that it's our first child. De Kleijn's biggest win to date came at the 2024 Paris-Nice, where he triumphed on stage 2 (Image credit: Getty Images) However, that season debut never happened.…