The British No 1 has only faced Steve Johnson once before , at last year 's Shanghai Masters .
The British No 1 has only completed a 6 - 2 6 - 4 win over the Californian .
The British No 1 has only faced Steve Johnson once before , at last year 's Shanghai Masters , and completed a 6 - 2 6 - 4 win over the Californian .