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Published 20:22 4 Aug 2017 BST
Updated 20:29 4 Aug 2017 BST

Along with many of those pointing this out...
https://twitter.com/racheltarbuck/status/893544668125954049
https://twitter.com/_mr_chips_/status/893544349337661440
https://twitter.com/WaspBoro/status/893548181300142081
https://twitter.com/cheekyrob83/status/893547365482758145
https://twitter.com/WTownsley/status/893546877869842433
...some put forward theories as to why the the decision to redo the pitch markings had been made...
https://twitter.com/paul_stanhope/status/893548214716071936
https://twitter.com/jonawils/status/893526434135912448
Although not confirmed, the Roker Report blog suggests that the change may have been requested by Grayson following the 5-0 preseason defeat to Celtic which took place on the originally-marked pitch last week. This was also suggested by Sky's commentary team during the first half.Explore more on these topics: