Sentence:  Smalling's quick <WSD>one-two</WSD> of yellow cards towards the end of the first half had left an air of inevitability about what would follow and, if anything, it was probably a surprise that City restricted themselves to Sergio Agüero's goal bearing in mind another of United's defenders, Marcos Rojo, was taken off on a stretcher early in the second half with a dislocated shoulder. 
Meaning of the word marked with <WSD> tags:  Two things in short succession