Mauricio Pochettino drops captaincy clue, while Levi Colwill looks capable of living up to the hype but Christopher Nkunku's early exit causes concern... THINGS WE LEARNED from Chelsea's 1-1 draw against Dortmund

Chelsea fought back to earn a draw in their final pre-season fixture against Borussia Dortmund.

At Soldier Field, Chicago, young striker Mason Burstow’s looping 90th minute header cancelled out Marius Wolf’s opener for Dortmund to ensure Chelsea ended unbeaten in the States at the end of their five-game tour.

Here are a few things Mail Sport learned from the game …

Pitch problems

The state of the Soldier Field pitch might have been a major concern when Chelsea’s players and staff got a first sight of it. It was patchy and worn and was not in the best condition at all.