The Spanish international striker is a free agent after being released by Deportivo La Coruna last week.
Because Depor released him before the transfer window closed, that meant he was eligible to move even after August 31.
He has now held talks with a host of clubs including a number from England, with Newcastle and Charlton rivalling Bolton.
However, the 30-year-old has now revealed that he has narrowed down his options to just two clubs.
"I will play in Mallorca or Bolton," he told the Spanish media.
"Now I have not decided the situation, but I will be in a place by this Monday."
Tristan's agent and father is believed to have held lengthy talks with Bolton over the last few days, whilst Mallorca will be hoping Tristan can resist the lure of The Premiership.
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