BLACKCAPS gun Glenn Phillips has continued his thunderous form against West Indies sides.

Fresh off his record 46-ball T20i century at the same Bay Oval ground against the West Indies T20 team, the 23-year-old has crunched a red-ball century just days later, on the second afternoon of New Zealand A's first-class fixture with West Indies A.

Phillips and Tim Seifert were in control for the bulk of the first two sessions of Day Two as they piled on an outstanding 226 for the first wicket in warm, fine Mount Maunganui weather.

Having begun his innings shortly before stumps the night before, the 23-year-old powerhouse reached three figures after lunch off 138 balls, in 185 minutes, with 10 boundaries and five sixes - all of them slammed over the leg side.

When Hayden Walsh finally induced a return catch from the opener when he was on 136, the pair had taken their first-wicket partnership to 226 - and Seifert carried on to reach his own century after tea.

Phillips's century had been his second first-class ton for New Zealand A, but a more circumspect Seifert's was his first at this level, coming off 231 balls, in 328 minutes, with seven boundaries.

He was eventually trapped by Raymon Reifer on 111, New Zealand A ending a strong second day needing just one further run to equal the West Indies' first-innings total of 322, with seven wickets in still in hand.

View the video scorecard here.