Gary Neville admitted that Manchester United's coaching staff couldn't believe how far Athletic Bilbao had run during the Red Devils' 3-2 loss in the Europa League eight years ago.
Bilbao were comfortable winners in the first leg of the last-16 tie at Old Trafford, and the statistics proved their physical dominance.
Neville revealed on Sky Sports that the United analyst checked the figures - that proved Marcelo Bielsa's side ran the hard yards to secure the win - three times as the results were such an anomaly in comparison to the Premier League.