"We went away from our systems a wee bit but then worked really hard. We hung in there and never gave up so they're all things that you can be proud of."
After taking a 12-7 halftime lead through tries to young winger Lolagi Visinia and No 8 Saili, code-hopper Israel Folau's introduction to the game had an immediate impact as he set up two tries and crossed himself with a sensational solo effort.
After Blues prop Tim Perry dotted down, Waisake Naholo notched two tries to put the Blues ahead before Tom Kingston's third try of the afternoon appeared to clinch victory for the visitors with just minutes left on the clock.
But Saili bashed his way over from close range to clinch the win after the siren had sounded and send home the 5000-strong Northland crowd on a high.
The Blues will complete their pre-season preparations against the Highlanders in Queenstown on Friday.
Blues 40 (Saili 2, Naholo 2, Visinia, Perry tries; Nikoro con, Kerr 4 con) Waratahs 36 (Kingston 3, Crawford, Holloway, Folau tries; McKibbin con, Foley con, Lucas con).
HT: 12-7.
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