Barcelona have ruled out making a bid for Robinho in January after revealing they had a bid turned down for the player.
The Brazil international, who joined Manchester City from Barca's arch rivals Real Madrid in the summer of 2008, has been a long-term target for Pep Guardiola's side and the player himself has made no secret of his desire to return to La Liga.
Laporta, speaking in an interview with Catalan radio station Rac1, said: ''We are very happy with the squad but if we have to make any improvements we will do.
''The conditions we set out for Robinho were not acceptable to City and since the squad are developing so well, unless there are any unforeseen last-minute changes we will not be signing anyone in January.''
Laporta was also delighted with the club's Club World Cup success.
''We must enjoy the moment but also keep going,'' he added. ''We have all lived through winning a very special title especially when you bear in mind our predecessors could not manage it. It was very emotional, seeing (coach) Pep (Guardiola) crying.
''It's a huge boost to morale and confirmation that Barca are the best in the world.''
Gerard Pique, meanwhile, is to be offered a new deal.
''I hope to do so (renew Pique's deal) before the end of my mandate,'' he said. ''He is one of the best central defenders in the world.''