I think his dream became true to play in the Premier League.
The Spurs midfielder, who had already been fouled, had his ankle trodden on by Shelvey, who received a red card for his actions.
"It's one of those things but he's a great player and I'm sure he's going to be disappointed", he told Sky Sports.
Rafa Benitez was forced into two first half changes, as Paul Dummett and Florian Lejeune suffered injuries.
The left-back was replaced by club captain Jamaal Lascelles.
Manchester City kicked off their English Premier League (EPL) football season with a 2-0 away victory over newly promoted Brighton & Hove Albion at the American Express Community Stadium.
Pochettino said: "He was calm - that's important". The game was now clearly in their favour and it was a matter of time before they would open the scoring.
Beyond a few speculative long-range shots by Eriksen, the game dawdled to half time with neither side seriously threatening a goal, and despite the injuries to half of his defenders, Benitez would have been happier than Spurs counterpart Mauricio Pochettino at the stalemate. We believe he will come back stronger. Spurs continued to see the game out comfortably, with Newcastle failing to provide much of a threat against the best defence in the league last season.
Harry Kane leads the line, while Eric Dier - who has previously played at full-back - and Mousa Dembele play in central midfield.