Seven minutes from time in the goalless draw at home to West Brom the England Under-20 World Cup victor had the ball in the net at the Kop end only for it to be disallowed after referee Paul Tierney, having initially pointed to the centre circle, chalked it off following consultation with his assistant.
"The second half we changed the system two or three times".
When asked afterwards for his thoughts on the incident, Klopp said: "Difficult".
Against United, Yacob will have to be at his best to limit the space available to Jose Mourinho's side in order to give West Brom the best chance of taking something from the game. But it would make no sense to be too frustrated about that. It's not on objective, for sure not.
The West Brom players were immediately on the ref's tail to get the goal erased and what surprised everyone at the stadium was perhaps the reaction of the linesman who didn't raise his flag for a handball. For me it's twice deflected and I'm still not sure if the hand was with the ball or not, and for me it looks like chest. In the game it looked 100 per cent like chest. Replays suggested Solanke had no intention of handling the ball as the ball sort of ricocheted off his shin onto his arm and then into the goal.
"Must be a really good assistant that made the decision", Klopp added. "He will be happy probably if there was a hand involved".
The draw at Anfield was Pardew's second point since taking charge at the Hawthorns following the dismissal of Tony Pulis and are now outside the relegation zone on goal difference.
"So it's a fearless and great decision from the linesman".
"It hit Solanke and he's swung his arm and it's gone in".
"It was the right decision but it was a fearless decision, so I thank him for that. It was always going to be hard but we have to learn from it". "In a league where the teams are so congested, every point is gold-dust and this is a really important psychological point for us".
"We've climbed out of the relegation zone".
"We didn't come here to open the game up, we're not in that place. I couldn't fault the players on that side".