VfB Stuttgart coach Sebastian Hoeneß is confident that his new national team players will continue their strong showings in Saturday’s Bundesliga match against mid-table Heidenheim. Full back Maximilian Mittelstädt had impressive maiden caps as a starter in the victories against France and the Netherlands, and scored against the Dutch. Defender Waldemar Anton and striker Deniz Undaf made their debuts off the bench and Chris Führich also came on after making his debut in autumn. All four have shone for Stuttgart who are playing a strong season in third place in the Bundesliga and aiming for Cha…