In Italy Haller encountered with Albert Brülls, Karl-Heinz Schnellinger and Horst Szymaniak three more German World Cup participants of 1962.

In 1973 Juventus – with Dino Zoff in goal, Franco Causio, Fabio Capello and the Brazilian José Altafini – reached the European Champions Cup final in Belgrade against AFC Ajax.

Two years earlier Juventus narrowly missed out in the finals of the 1970–71 Inter-Cities Fairs Cup, having to concede the title to the Billy Bremner led Leeds United after results of 2–2 and 1–1 on the away goal rule.

[4] At the World Cup 1962, Haller was a regular of the German side that drew against Italy and overcame hosts Chile and Switzerland in the group phase, but in the quarterfinals Yugoslavia prevailed 1–0.

At the 1970 World Cup, where West Germany attained third place, Haller was only used in the first group match against Morocco, being replaced by Jürgen Grabowski at halftime.

[5] Both a playmaker and goalscorer, Haller was noted for his exceptional technique and finesse as a striker, yet also for his weight problems, which troubled him throughout his career.

"[8] In later years Haller did some coaching of amateur level clubs, including FC Augsburg, and ran a fashion shop.