The centre-half was linked with a move to the Stadium of Light, and it appeared as if a deal was drawing to a close. The 30-year-old Belgian international, however, has failed a medical with the Wearside club, meaning a deal is now off the table.
A fee had been reached with Zenit concerning his move to the club, whilst personal terms had also been agreed, but an issue with his medical yesterday means that the transfer will not be pursued.
Due to this issue, the Black Cats have already started tracking other central defensive targets to sign this summer.
However, this new shortlist does not include Celtic defender Virgil van Dijk, who has long been linked with a move to Wearside. Van Dijk was being targeted by the club prior to the end of last season, and their interest only dropped when a deal for Lombaerts looked close.
But despite the collapse of the Lombaerts transfer, Sunderland will not go back in to sign Van Dijk this summer. There are no references in the report as to who Advocaat is now looking at to improve his back-line, which has already seen the permanent arrivals of Adam Matthews and Sebastian Coates.