If Leicester City learned one thing from their shock defeat at bottom-of-the-table Peterborough, it was how vital Chris Wood is to the promotion push.
It is not often when chewing over the aftermath of a game that the one player who dominates the thoughts is one who was not even playing.
But that was the case after City's recent excellent form came to an abrupt end at London Road.
It is no coincidence that City's five-game winning streak, which saw them soar into second place in the Championship table, coincided with the arrival of the 6ft 3in striker.
Wood's phenomenal scoring record is impressive enough, but his overall play and his flourishing partnership with David Nugent has transformed this City side.
City looked like a team that might be missing that extra ingredient to be serious automatic promotion contenders.
Then Wood arrived and helped turn them into a side that looked as if they would be impossible to stop.
When he was rested for the FA Cup tie at Huddersfield, City lacked that killer touch in front of goal to see off the Terriers at the first time of asking. It was Wood who went on off the bench to rescue a replay.
His rising importance is probably why City were guarded about the knock he picked up in training which kept him out of the trip to face Posh.
So it was a relief for all City fans to hear Nigel Pearson state after the 2-1 defeat at Posh that the New Zealander will not be out for too long.
That is not to say City are a one-man team, far from it. But Wood gives them that extra punch in the final third.
Jamie Vardy was given the task of stepping into Wood's shoes and, while the former Fleetwood man is a bundle of energy and never stops moving, he struggled to have any impact on the game.
When Vardy had a great chance to put City 2-0 ahead after Ben Marshall had fired them into the lead, he was unable to take it.
Andy King had done superbly to tee him up and Vardy had only goalkeeper Bobby Olejnik to beat, but he blasted it too close to the Posh keeper, who deflected the ball over the bar.
Vardy was not the only one guilty of squandering chances.
Nugent had a good opportunity in the first half but his finish lacked the power to beat Olejnik and, right at the death, substitute Martyn Waghorn had a golden chance to rescue a vital point but could not hit the target.
How City needed to be more ruthless in front of goal because, for once, their rear-guard, which had shipped only three goals in the previous six games, was carved open far too easily as Posh were allowed to claw their way back into a game that should have been beyond them.
More than 5,000 City fans made the trip to London Road and left disappointed, but the greatest concern among them may not have been the three points dropped on a weekend when none of their promotion rivals were able to win.
Their biggest concern may have been just how long will they be without Wood.
