Coach Ronald Koeman had told the player, who turned 21 a month ago, that he didn't want him this season. Speaking after the game, which Barca won thanks to a solitary Antoine Griezmann goal, Koeman implied that the youngster would indeed be on his way out.
Kike Gonzalez put Eibar ahead in the 50th minute, but two goals in an eight-minute spell on 62 and 70 minutes from Gerard Moreno and Paco Alcacer gave Unai Emery his first triumph at the club and also highlighted the attacking talent at his disposal.
Li Shenglong's fantastic diving header threw SIPG into the second round after collecting Civanildo Souza (Hulk)'s corner kick.
"It's not true that I'm not counting on him," insisted Koeman, who believes a loan move is likely.
But there was no place for striker Edinson Cavani, who has yet to find a new club after parting ways with Paris Saint-Germain in June. The 33-year-old has not played since March.
A wonderful through-pass by the home team's defender Eric Davis sent Marko Divkovic on a wild run and put him head-to-head against Jablonec's goalkeeper Jan Hanus in the sixth minute and the Croatian striker sent a beautiful lob shot over him to open the score and put Dunajska Streda ahead.
Just three minutes into the second half, Hamdallah doubled his team's lead and his own tally after tapping in a rebound that fell to him just outside the six yard box, after a magnificent solo run down the right by Khalid Al-Ghannam ended with his initial shot being deflected into the Moroccan's path.
The Spanish press also report on Wednesday that Real Madrid and Tottenham are also talking about a loan deal to see Gareth Bale go back to White Hart Lane, seven years after leaving the club to join Real Madrid.
Elsewhere, Eintracht Frankfurt shared the spoils with newly-promoted Arminia Bielefeld following a 1-1 draw. Augsburg downed Union Berlin 3-1 with two late goals, while Freiburg secured a 3-2 victory over newly-promoted Stuttgart. Enditem
The next FIFA World Ranking will be published on October 22. Enditem
During the last two seasons in the Premier League, Jota scored 16 goals in 67 appearances as Wolves finished seventh in back-to-back campaigns.