"The welcome that Markus was given when he arrived at the Saints just over a year ago was something that gave him a deep sense of pride and satisfaction. The progress of the Saints was always uppermost in his mind.
"He would have wanted to be there when the Saints get promotion to the Premier League.
"The well-laid plans for the club that he and the executive chairman [Nicola Cortese] had mapped out over a year ago will continue to be implemented uninterrupted and nothing will change in that regard.
"The club will ensure that Markus' wishes are carried out in full. The Saints were Markus' constant preoccupation. He certainly didn't like losing.
"And his constant ambition was to see open, attacking football played to the highest possible standard. To Markus, last year was the start of getting the Saints back on the march."
Southampton won the Johnstone's Paint Trophy and finished seventh in League One, missing out on a play-off place by seven points after starting the season with a 10-point penalty, in Liebherr's only season as owner.
The club said a memorial service would be held in due course and that a book of condolence would be available for fans to sign.
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