 Complete the following phrase:  At Juventus, Kovačević found goals in both the Serie A and competitions such as the UEFA Champions League and UEFA Cup becoming their leading European goal scorer, and the top-scorer of the UEFA Cup during the 19992000 season, with 10 goals; despite facing competition from the clubs starting attacking partnership of Filippo Inzaghi and Alessandro Del Piero, Kovačević made a total of 44 appearances in all competitions in his first season with the club 27 in 