Liverpool are strong in every aspect at the moment, so even with the transfer window open ahead, they may not want to buy any players with too much interest. But If they spend some money and buy more important players then their squad will be stronger.
Liverpool may be at their best form currently but it doesn't mean they should not hunt for more players in the transfer window because if they don't add more quality players to the squad, it will affect them when some of their key players starts getting injured. Since they are still in a very good performance is the time for them to solidify the team more so that they can become more stronger to face the premier league games and the champions league. They should not relent and feel they have the squad to take them to victories