Van Dijk and Joe Gomez has been out of the Liverpool team for a very long time due to injuries, during the time they picked up their injuries there are several cases but their own seems to take long because it is a serious one. Virgil van Dijk has been out with his knee injury since October when he collided with Everton's Jordan Pickford in the Merseyside Derby, while Joe Gomez suffered his knee injury in November and since then they have been in rehabilitation for a swift and strong comeback.
Both players are so important in Liverpool squad but their injury caused so much issue for Liverpool as they lost the English Premier league title to Pep Guardiola, but as some of the injury players keeps coming back they are able to come back and winning some vital match which later earn them a place in the top 3 and they were able to qualify for Champions league. Liverpool was also knocked out in the quater finals by Real Madrid and the season never seems to be as they want when it ended.
However, they are back from injury and they have also been engaging in training but it seems to early for them to come back as they are not fully fit which may result in more dangerous injury if they were fouled again. They have not been engaging in any pre season match and their return time to action is yet to be announced but its so certain they will be back before first five week of the English Premier league. They are highly needed to boost the squad and Van Dijk position is lacking due to his experience and he was one of the most reliable player at the defense line.