Sentence:  They still had Sergio Agüero to bring off the bench and the Etihad was <WSD>overdosing</WSD> on optimism. For the game to finish with an aggregate 5-1 score distorts the fact the occasion was full of drama and suspense until Salah's goal conclusively changed the complexion of the evening. 
Meaning of the word marked with <WSD> tags:  To indulge in something excessively.