The Blues had an opening offer for the wantaway striker immediately rejected last Tuesday and are expected to return with an improved bid.
Mourinho recently suggested an over-long transfer saga could affect the "balance" of a team very close to the start of the season, but hinted the club are in no hurry to force a move.
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"But we are calm as we told you that we are calm because we are happy with what we have."
Mourinho was speaking after Chelsea's emphatic 8-1 victory over Indonesia All Stars, with Ramires and Romelu Lukaku both grabbing doubles.
Fernando Torres failed to register on the scoresheet, but Mourinho believes the Spaniard will improve the added competition for places after Lukaku's return from a loan spell with West Brom.
"I think Fernando should be happy because we have competition in the team and I think that is good for everybody in every position," he told reporters.
"Fernando I think will be pleased because during his time at Chelsea he was basically the only striker and then after that there was the arrival of Ba in January. Now the team has three strikers and I think that is good."
Mourinho also confirmed the injured trio of Frank Lampard, Andre Schurrle and Kevin de Bruyne are all expected to train with the squad next week.