When India's batsmen emerged this morning, they would have expected Daniel Vettori to be the main obstacle between them and the follow-on target of 431. But as it turned out, he was relegated to bit-part status by a magnificent spell of controlled medium-pace from Daryl Tuffey, which pushed India over the edge and into the humiliating situation of following on in a home Test match.

Tuffey never attempted to match the pace of Ian Butler, bowling most of his deliveries at around 125kph, but he compensated with an unerringly accurate line that gave the batsmen no room to take liberties. His spell in the morning - straddling two innings - produced 4 for 14 from 10 overs, and was characterised by his ability to put the ball on a spot just on or about off stump, while also obtaining occasional steepling bounce. Of the 60 balls he bowled, 55 pitched on or outside off stump, and all four wickets came courtesy of edges to the wicketkeeper or slip.

He started off by snipping off India's excuse of a tail to enforce the follow-on. L Balaji and Zaheer Khan were both undone by deliveries that pitched bang in the corridor of uncertainty outside off stump. Two feathered edges did the rest.

But Tuffey wasn't done. Virender Sehwag, who lashed a cavalier 130 in the first innings, was tempted into slashing at one that was just a mite too close to his body, while Rahul Dravid played a more hesitant stroke to one that was pitched on off stump. Stephen Fleming took both catches, and Tuffey went to lunch well pleased.

As if to prove that he wasn't just a morning person, he came back after the interval to castle Sachin Tendulkar. Medium-pace bowling in Indian conditions doesn't get much better than that.

Dileep Premachandran is assistant editor of Wisden Cricinfo in India.