The race is normally won by one of the top sprinters in the peloton, a status that the 22-year-old Ewan is on the cusp of despite his relative youth.
Ewan began the season in peerless form in the Australian sprints but hasn't won since, a fact that he'll try to rectify in the back half of the season.
Ewan will be up against a world-class field, including sprint stars like Andre Greipel (Lotto Soudal), Elia Viviani (Team Sky), Alexander Kristoff (Katusha), Nacer Bouhanni (Cofidis) and Mark Cavendish (Dimension Data).
Alongside teammate Luka Mezgec will be looking to build on the developing relationship the pair began to form in this years Giro d’Italia with the Slovenian as the young Aussie's key leadout man.
Road captain and Paris Roubaix winner Mathew Hayman returns along with Christian Meier and Australian’s Luke Durbridge and Mitch Docker to give the team a reliable core.
Sport director Matt White is pleased to have a strong and motivated team for the race, but highlighted that this will be the first race since the Tour de France for half of the squad.
“It is always a long and relatively steady kind of race,” said White. “The parcours is usually straightforward and with technical finishing circuit that includes the steep final climb, the race has the potential to suit our characteristics.”
“Most of the guys are coming back to racing after the Tour and for Daryl Impey and Michael Albasini, the Olympics also and there isn’t many better races than this one to help find your racing legs again.
“The race will be a good experience for Caleb because he will be lining up against the crème de la crème of the sprinting world giving him the opportunity to test himself against the world's best.
Ewan recently renewed his contract with the Australian squad until the end of 2018 and will be looking to show that he can justify the expectations and investment put in by the team in developing him and his sprint train.
“We have a super team for the race and we are all highly motivated to achieve a good result here, we have balance and experience within the team that gives us strengths for each eventuality.”
The race normally follows a 250 kilometre route that starts and finishes in downtown Hamburg.
The parcours heads out of town and into the suburbs over rolling urban roads before turning into a difficult finishing circuit which tackles the tough Waseberg hill three times before the finale.