The advent of prozone and an avalanche of statistical date has ensured that the performances of top stars at the highest level of European football are now scrutinised more than ever before.
Champions League action in particular gets the benefit of a full breakdown in terms of picking apart unfortunate errors, as Chelsea stars David Luiz and Petr Cech will testify following their mistakes in last night's 3-1 defeat to Paris Saint-Germain in their quarter-final first leg.
GMS has decided to use the plethora of information provided by UEFA.com surrounding the Champions League to definitively answer one question, who is the hardest-working player in the competition this season?
Our countdown features stats on ground covered on the pitch for every player in the tournament up to and including this week's matches, with Barcelona star Lionel Messi falling a whopping 24,000m off contention, to give you an idea of the standard required to make the cut.
Take a look at the 50 players who have run the furthers in the Champions League in our pedometer of top talent and please share your thoughts in the comment box below.