City come into the game still unbeaten in the league this season, and heavily linked with a move for Arsenal's Alexis Sanchez.
He said: "We have open eyes through this transfer window, but we will not make insane things".
Chelsea and current Premier League leaders Manchester City were thought to be interested in the defender over the past year, but Van Dijk chose Jurgen Klopp's Liverpool after a move broke down in the summer.
Jurgen Klopp's men have found form themselves and have not lost in 13 outings in the league, making them strong challengers for at least second place.
Manchester City boss Pep Guardiola has set a Premier League record by being named manager of the month four consecutive times.
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The former Manchester City youth player will be desperate to get away from Liverpool if he is to have any chance of being considered for the World Cup in Russian Federation this summer.
After missing Liverpool's last two games due to a groin injury, Salah is back for the Reds and just in time too, as Manchester City prepare to visit Anfield.
"If someone had said after that game 15 years ago that City would become a bigger club than Liverpool they would have laughed at you, thought you were mad".
Klopp's men are now fourth, but could move to second and close the gap between them and City to 15 points should other results also go their way.
"You have to win these kind of games". Even in midweek, when City looked lackluster against Bristol City, they still managed to produce a late victor. Is it a lack of concentration?
Van Dijk's performances against imposing opposition undoubtedly played a part in Liverpool's decision to spend £75 million on his services, and Sunday's clash against City is a chance for the centre-back to build on a solid start against Everton. City were exposed on their left-hand side with [Nicolas] Otamendi and [Mohamed] Salah taking advantage of [Fabian] Delph, who we all know is not a left back, and Otamendi was exposed.
Guardiola landed the honour in September, October November and now December as his unbeaten side continue to receive praise from all corners, having dropped just four points all season in the league. If he can keep Aguero quiet once more, it may hint that Liverpool finally have the foundation on which to mount their own title challenge next season.