His involvement in various activities whilst on tour will have already been agreed, with Tottenham committed to delivering on those plans.
It is understood that it would take an offer way above Son’s valuation for Tottenham to consider selling their skipper ahead of the tour.
Spurs are yet to receive any formal offers for Son, who captained the club to their first trophy in 17 years last month in the Europa League final against Manchester United.
It remains to be seen how Son fits into new head coach Thomas Frank’s plans for next season.
Frank, who will report into Tottenham’s Enfield training ground this week, is eyeing attacking reinforcements this summer.
The club have already secured the permanent signing of Mathys Tel from Bayern Munich and have an interest in signing Brentford’s Bryan Mbeumo.
There is a sense that Son’s future is likely to drag on into the latter stages of the transfer window which closes on September 1.
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