Vitoria claimed sixth in the Primeira Liga last season, picking up 53 points from their 34 matches, which has seen them qualify for the Europa Conference League second qualifying round.
Moreno’s side will take on Slovenian outfit Celje for a position in the next round of the European competition, with the first leg of their contest set to take place on July 26 before the return match one week later.
Vitoria will also be in Taca da Liga second-round action against either Santa Clara or Tondela on July 28, while their league campaign begins away to Estrela on August 12, so competitive action is just around the corner.
The Portuguese outfit have a busy run of matches before then, though, facing Middlesbrough and Wolverhampton Wanderers on Saturday and Sunday respectively, while they will also take on Fafe, Rio Ave and Boavista in non-competitive fixtures.
Moreno’s team have already been busy in the market this summer, bringing in Ze Carlos, Telmo Arcanjo, Joao qMendes, Charles and Ricardo Mangas to boost their squad for the new season.
Middlesbrough, meanwhile, enjoyed an excellent campaign under impressive head coach Michael Carrick, who led the team to a fourth-place finish in the second tier following his arrival last October.
Boro therefore competed in the Championship playoffs, but they suffered a 1-0 defeat to Coventry, who were then beaten by Luton Town in the final at Wembley.
Middlesbrough are facing Vitoria as part of their training camp in Portugal, while they will also take on Hartlepool United, York City, Rotherham United, Real Betis, Bradford City and Auxerre in friendlies this summer.
Carrick’s team will begin their 2023-24 Championship campaign at home to Millwall on August 5 and will then be back in action three days later against Huddersfield Town in the EFL Cup.
Boro have only made one signing thus far this summer, bringing in Alex Gilbert from Brentford, but Rav van qden Berg is said to be on the verge of joining from PEC Zwolle, while Sammy Silvera and Tom qGlover are also believed to be closing in on moves to the Riverside Stadium.