Vialliâ€™s two former clubs meet in the Champions League on Tuesday just days after the Old Lady tried and failed to breakdown Lazio.
â€śJuventusâ€™ issues in attack revolve around the fact that their forwards are all on the same level,â€ť he told Tuttosport.
â€śNobody has illustrated that they are world class and that is why boss Antonio Conte rotates them in the way he does.
â€śThe side can benefit from that ploy as a result, but the individual players certainly wonâ€™t.
â€śIt is hard to choose which pairing to go with, because there is not one which you can say is the strongest.â€ť