The Reds have completed two of the priciest deals from Premier League clubs in bringing in Florian Wirtz and Hugo Ekitike, while United forked out huge sums for Benjamin Sesko, Matheus Cunha and Bryan Mbeumo. The likes of Viktor Gyokeres, Joao Pedro and Martin Zubimendi have also moved for big fees, but Rooney believes Liverpool have done the most astute piece of business by signing Frimpong.