"He's threatening the space behind defenders and that's the worst thing for defenders to play against," Solskjaer said.
Playing across the width of the 18-yard box, the Liverpool forward found space between defenders with brilliantly timed runs.
Long found space inbetween defenders with 20 minutes remaining and was granted the freedom of the penalty area to convert James Ward-Prowse's cross.
And not, as might have been expected, with the ball delivered in the air, but the speed of PSG's runners into the space between defenders.
The winger's spring into space between defenders was timely, his header firm beyond the hapless Andriy Pyatov and, from playing catch-up, the holders – staggeringly – had wrested back some authority in the group.
Against Seattle, Rennie tinkered, found room for Kobayashi in the middle, and set Manneh free to exploit the space that defenders threw at him while they were worrying about Camilo.
Barcelona's movement off the ball, the positional awareness of the players, the work rate when not in possession, and the ability to manipulate space and defenders are the buzzwords that I've heard a great deal around the sport of rugby, for example.
Murphy found space between defenders Victor Palsson and Sean O'Hanlon to nod Tom Hateley's deep cross past Stack from close range.
Similarly, the corners of a square keep created dead space that defenders could not fire at, but missile fire in castle sieges was less important until the introduction of the crossbow in the middle of the 12th century, when arrowslits began to be introduced.
Vardy or Okazaki will head into one of the two wide spaces those defenders have vacated: the left-back's space if the ball is going down that way; the right-back's if it is going that way.
