Defending champion Francesco Friedrich got his two-man bobsleigh World Cup campaign off to the perfect start with victory in Sigulda.
Germany's reigning Olympic and world champion, alongside brakeman Thorsten Margis, won in a combined time of 1:39.23 seconds, a mere 0.04 ahead of compatriot Johannes Lochner who finished in 1:39.27.
Lochner set a new track record of 49.51 seconds with Christian Rasp in the first run but the World Championship runner-up could not defend a narrow lead on his second run, with Friedrich's time of 49.64 edging him to the victory.
Unerring Friedrich clinches 11th world title
Switzerland's Michael Vogt and Sandro Michel finished two tenths behind in third with a time of 1:39.49.
German Christoph Hafer, alongside Christian Hammers, finished fourth while Austria's Ralfs Berzins came fifth.
Friedrich on top at halfway mark of four-man World Championships
Friedrich makes it six in a row in Altenberg