Vieira's return to HSV marks a significant boost for the Red Shorts, who finished 13th in the Bundesliga last season. The Portuguese midfielder was a key player for HSV during his season-long loan spell last term, scoring seven goals and providing six assists across 31 competitive appearances. His performances helped the promoted side stay up in relative comfort.
HSV sporting director Claus Costa praised Vieira's qualities, stating, "We all know what we have in Fábio. He was an absolute game-changer for us last season and possesses qualities that add a special dimension to our play." Costa also expressed his delight at completing the transfer, saying, "We are overjoyed that we were all able to complete this transfer together and that Fábio is now a long-term member of the HSV family."
Vieira, who has 25 caps for Portugal's U21s, made 49 competitive appearances for Arsenal after joining the English Premier League champions in 2022. He could make his return to the field in a Hamburg shirt on Sunday when HSV host Mainz.