However, Slovan failed to defend the fragile lead and the home team managed to tie things up in the final minute of overtime, forcing a penalty shootout.
The single-leg match of the third qualifying round was played behind closed doors at Bloomfield Stadium in Jaffa, the southern part of the coastal city of Tel Aviv-Jaffa.
Valencia's 4-2 win at home to Levante was a major boost for Javi Gracia's side after a difficult summer and they will look to keep that positive feeling going even though Gracia continues to ask the board for new signings.
The single-leg match was played behind closed doors at Sammy Ofer Stadium in the northern city of Haifa.
In the first stage competition held in Milton Keynes, England, 31-year-old Xiao won the group decider against Iran's Hossein Vafaei 3-0.
"He's an important leader for the team and a big part of what we're building. He wants to be up there with the best players in the world and leave his mark. He can achieve that here," said Arteta.
Nouri has been without a team since parting company with Hertha BSC in April.
After suffering five defeats consecutively, Qingdao had no chance of being among the top eight in the next league session, although three games of the first session remain on the schedule.
Ismael Al Hammadi (L) of Shabab Al Ahli vies for the ball with Ali Nemati of Shahr Khodrou during the AFC Asian Champions League group B football match between Shabab Al Ahli of United Arab Emirates and Shahr Khodrou of Iran at Al Janoub Stadium in Doha, Capital of Qatar, Sept. 17, 2020. (Photo by Nikku/Xinhua)
Infantino also reiterated FIFA's prioritization of women's football through the recently-launched FIFA Women's Development Program and investment totaling one billion US dollars over the current four-year cycle.
This week saw Koeman's men beat Girona 3-1 in another preparation game, but Saturday will be their last chance to get things right before things are for real next week.