Federer vs Del Potro prediction

Federer is playing another Final this year , being undefeaded in 2018 he has the best start of hes career despite hes pretty old age (36 years old) he is not planing to stop impresing us with hes huge talent .He had a pretty strong tournament so far despite pretty easy opponentes he managed to lost a set against Coric in the previous round who caused him some problems .Del potro in the other side has a good start of season as well , winning the Acapulco tournament losing only one set as well. He past over Raonic without any problem in the semi final but had more problems against Mayer or Kohlschreiber.This is a clasic game , played before for no less than 20 times between two of them and for sure will be a good fight and a match to watch.In my opinnion Federer should win the tournament ,maybe in 3 sets.