Bournemouth defender Nathan Ake is interesting Manchester City.
The Sun says a priority is the capture of a centre-half.
The loss of Vincent Kompany is a hammer blow, and with concerns over the fragility of England defender John Stones, Guardiola wants another centre-half.
Guardiola has been an admirer of Dutch former Chelsea central defender Ake, 24, for some time.
Ake, also wanted by Tottenham, partners Liverpool's Virgil van Dijk at the back for Holland.
He would provide competition for Stones, Aymeric Laporte and Nicolas Otamendi, and let Guardiola avoid using Fernandinho as an emergency centre-half.