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The result means Antonio Conte's side are 13 points clear at the league summit, although that could be scaled back to 10 if Milan overcome Lazio on Tuesday (AEST).
Inter struggled for long periods against Verona, but sealed a 13th consecutive Serie A home win for just the second time in their history 14 minutes from full-time courtesy of substitute Matteo Darmian.
The wing-back powered forward, collected Achraf Hakimi's pass and slotted past Marco Silvestri from 10 yards to help his side return to winning ways after two draws in the top flight.
Inter started sluggishly and could have fallen behind shortly after the midway point of the first half.