Borussia Dortmund may not have kicked off the new Bundesliga season in quite the fashion that they would have hoped for, but few could fault their flawless execution in this summer's transfer window.
Bringing in no less than six first-team challengers over the past few months, Jurgen Klopp and his backroom staff have clearly learned their lessons from last season by ensuring that the squad now has adequate strength in depth.
But have all the holes been plugged? All the gaps replaced? There's a grueling domestic and European campaign ahead for this Dortmund side, and it will be tested in every possible manner by the end of it. Now it's time to see if Klopp has prepared each position for the season ahead.