Blur frontman Damon Albarn ruled out doing further shows with the Britpop band following their successful comeback gigs, in an interview due to appear Monday.
The singer said "the same problems would rear their heads" and he did not want to "ruin" what had already been achieved with their giant shows over the last two months.
Albarn, guitarist Graham Coxon, bassist Alex James and drummer Dave Rowntree had not performed together as a four-piece since 2000. Coxon left the band in 2002.
The others carried on without him, but the band had been dormant since 2003 until Albarn and Coxon patched up their differences.
"This is beautiful, what we've done, and I don't want to ruin it," Albarn told Q monthly music magazine.
Blur played 12 shows over June and July, headlining Glastonbury, T in the Park and Oxegen -- the biggest music festivals in England, Scotland and Ireland respectively -- plus two sold-out gigs of their own in London's Hyde Park.
But chief songwriter Albarn effectively ruled out further gigs in the Q interview.
"I just can't do it any more. Because it will come back, the cynicism," he said.
"With touring, the repetition will come back and I just always need to do new stuff. What I wanted to do was heal to the point where I know I can always ring Graham up in the future and it will be fine. That's all I wanted to do and we've done that, definitely.
"But if we carried on, the same problems would rear their head because of the status quo in the band.
"I've generally always written everything. Graham's contributed great extra bits, he does the work as well. But it has to come from somewhere to start off with and that is a big, big part of it, getting the whole idea together."
The 41-year-old said closing Glastonbury was "truly ecstatic".
"When I die, that will be the one moment that will flash before me," he said.
Blur, whose hits include "Girls And Boys" and "Parklife", were at the forefront of the Britpop guitar music scene in the 1990s and nurtured a very public rivalry with rockers Oasis.
Albarn has since enjoyed commercial and critical success with his hip-hop band Gorillaz and The Good, The Bad And The Queen, as well as working extensively with musicians from Mali. He has also worked on "Monkey: Journey To The West", a pop-opera inspired by Chinese legend.
He is currently working on his third Gorillaz album.
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