£10 million signing Tomkins mainly missed the back end of last season through injury.
Co-incidentally Crystal Palace lost the three games he missed and kept a clean sheet when he returned.
Fosu-Mensah debuted at centre back on Saturday but De Boer could be looking to give Tomkins more than the 12 minutes he had versus Huddersfield to give a little experience while they adjust the the new formation and tactics.
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