* Sprint can grow on its own but merger door open with mgt rights: Son
* Comments come after breakdown of merger talks with T-Mobile
* Finalising conditions which must be met for Uber investment: Son
* Q2 op profit rises, buoyed by Vision Fund's gains (Releads with Son's comments at briefing)
TOKYO, Nov 6 (Reuters) - Sprint Corp can grow on its own but will still consider a merger if it can get management control, CEO Masayoshi Son of the U.S. wireless operator's parent SoftBank Group Corp said, days after a move to combine with T-Mobile US Inc ended.
Sprint and T-Mobile said on Saturday they had called off merger talks, denting the dealmaking credentials of Son, who has raised close to $100 billion for his Vision Fund to invest in technology companies.
It also puts Son under pressure to find another way to turn around the carrier, the No. 4 U.S. provider which is weighed down with $38 billion in debt and is struggling to compete with Verizon Communications Inc and AT&T Inc.
I feel good about this decision, Son said of the decision to call off merger talks.
"Even if it is tough for the next three or four years, on a five or ten year timescale scale it is a strategically indispensable company," he told reporters at SoftBank's earnings briefing on Monday.
However, when asked about the failed T-Mobile merger, Son said that "the door is open" if its management rights are preserved.
SoftBank said on Sunday it would raise its stake in Sprint to under 85 percent from 83 percent, the most it can hold without triggering a tender offer for the remaining shares.
"U.S. telecoms is indispensable infrastructure and as an investing company SoftBank should have the ability to control such infrastructure," Son said.
The Japanese tech and telecoms firm is funnelling money to U.S. firms as it invests in technology companies around the world, including through its Vision Fund, as founder Son pursues his vision of a future driven by artificial intelligence, interconnected devices and robotics.
The company is finalising conditions for investment in Uber Technologies Inc that must be met, Son said, including pricing and negotiations with existing investors.
"I believe that Uber is a good company," Son said, adding that "whether we make an investment in Uber or not is not decided".
SoftBank, along with other investors, is expected to purchase as much as $10 billion in Uber shares, most of them from employees and existing investors in a so-called secondary offering.
SoftBank reported on Monday a 21 percent rise in second-quarter operating profit as the value of its technology investments grew.
Profit for the July-September quarter rose to 395.6 billion yen ($3.46 billion) from 328.1 billion yen a year earlier. Excluding profit from the Vision Fund, income would have fallen 4 percent.
SoftBank shares closed down 2.6 percent in Tokyo on Monday. The benchmark Nikkei 225 index closed flat. ($1 = 114.2700 yen) (Reporting by Sam Nussey, writing by Ritsuko Ando; Editing by Muralikumar Anantharaman)