Pavlov believes that Ivan the Russian was among the Bulgarian nobles that ousted the weak Ivan Stephen in 1331 and placed Ivan Alexander (1331–1371) on the throne.
In 1356, Bulgarian tsar Ivan Alexander isolated Vidin from the Bulgarian monarchy and appointed his son Ivan Stratsimir (1356–1396) as absolute ruler of the domain of Vidin.
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To overcome his failure to secure gains against the Serbians, Andronikos III attempted to annex Bulgarian Thrace, but the new tsar Ivan Alexander of Bulgaria defeated Byzantine forces at Battle of Rusokastro on 18 July 1332.