Imam and Zaman were hardly troubled by New Zealand's pace until Ferguson's sharp rising delivery forced Imam to retire hurt on 16.
Later, the Pakistan Cricket Board confirmed on Twitter that Imam's scans were clear.
Earlier, the team management had said Imam will undergo CT scans and will be kept in observation for the next 48 hours. Fakhar Zaman was seeing signaling to Babar Azam to join him in the middle as the on-field umpire Shozab Raza told the Pakistan team physio to take Imam off the field.
The opener wanted to continue with bat, but it appeared hard as he hobbled briefly from a stationary position after batting partner Fakhar Zaman and New Zealand captain Kane Williamson checked on him.
Pakistan have levelled their ODI series against the Black Caps in Abu Dhabi this morning after some strong bowling was backed up by a stellar opening innings for a six wicket win.
New Zealand stayed faithful to the same combination which won the first one-day global by 47 runs, also played in Abu Dhabi, while Pakistan brought in Faheem Ashraf for Junaid. He bowls with good control and variation, while his added height means he gets that extra bit of bounce.More news: Nicki Minaj's Dressing Room Hit in Tekashi 6ix9ine Music Vid Shooting
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New Zealand squad remains unchanged from the side that beat Pakistan by 47 runs in the first game. "It wasn't enough on that surface".
Ferguson, who finished with 3-60, then had another lucky wicket of Shoaib Malik for ten when a ferocious pull deflected off Nicoll's shoulder and was caught at mid-on by Ish Sodhi.
Mohammad Hafeez stayed unbeaten on 27 and raised Pakistan's victory with a crisp boundary off Tim Southee.
Shaheen Shah Afridi took four wickets and showed quick thinking to run out Kane Williamson for only one when the New Zealand captain failed to recover his ground at the non-striker's end.
Taylor hit three boundaries and a six for his 43rd half-century in ODIs. Nicholls was finally bowled in the 38th over by Hasan Ali who finished with 2-59.