Mourinho faced the press ahead of tomorrow's season opener against Leicester City, though the major topic of information was whether or not United would strengthen their squad.
"My view is that first of all is hard for me to believe we finished second", he added.
Real Madrid was already pursuing the Belgium goalkeeper before striking the €35-million ($52.45-million) fee with Chelsea. But a return of just two points from their opening three home games meant Tottenham were playing catch-up virtually from the off. Asimilar result at Newcastle will provide the ideal response to the questions raised in recent days, yet whatever the outcome, Tottenham's approach to the recent transfer window will continue to be placed under close scrutiny.
United and its fans pride themselves on the club's history of promoting youth team players and nurturing them into world class talents.
Ayew, who has 11 goals in 49 appearances for Ghana, scored 11 times for Swansea last season as he impressed in a struggling side.
When asked whether he expected to welcome a fresh additions to his United squad, Mourinho offered these comments: "The information I have is no".
Sarri didn't get off to the best of starts last week as Chelsea were easily brushed aside by Manchester City in the Community Shield.
Likely to sit the deepest in his manager's preferred midfield three, Sarri will be hoping the midfielder can exert similar influence on his new side having made more passes than any other player in Europe's top five leagues last season.
Few transfers were expected this summer due to their tight financial conditions but a deadline day deal was still hoped for among Spurs fans.
Chelsea became favourite to land the CSKA Moscow midfielder as Sarri wanted to overhaul his midfield, the club quickly began the process to sign the player and an agreement had been reached with the club.
The club, who will play in the Champions League once again this season, are paying off the cost of their new stadium. "We recognise the achievement in keeping our squad together, for now at least, and in getting key players to agree new contracts".
The club, however, opted to sign Aston Villa midfielder, Jack Grealish as reinforcement in the midfield but the deal failed to materialize as Aston Villa rejected the £25m bid for the player until the transfer window finally closed on Thursday.