Ben Davies made his first start of the season for Tottenham on Wednesday night, as they drew 2-2 away to Olympiacos in Greece.
Spurs started their Champions League group by blowing a two-goal advantage and had to settle for a point.
Harry Kane and Lucas Moura continued their love affair with the competition by scoring in the first-half, but Mauricio Pochettino’s side were nowhere near their best and were punished by the hosts with their deserved comeback.
Davies did weigh in with a decent assist for Moura’s goal, as he won the ball back with some front foot defending and passed to his teammate on the edge of the box.
The 26-year-old defender tried to get forward when he could down the left flank and his assist was a result of his pressing.
But unfortunately his defensive weakness was exposed against Olympiacos, who particularly made the most of his lack of pace.
Davies had a torrid night with his back to goal and was terrorised by winger Daniel Podence.
The Welsh full-back was left completely helpless against Podence just before half-time, as he sprinted past him to get into the box and scored a goal that got Olympiacos back in the match.
He is a left-back that massively lacks speed and defensively he can be a liability when Spurs play against stronger opponents.
Danny Rose looks the far more accomplished option at left-back given his speed and athleticism, which is why Davies should be sidelined in the Champions League fixtures.