Guardiola hailed Grealish following his great Champions League debut

Jack Grealish

, who joined Manchester City from Aston Villa for a record £100 million in the recent transfer window, became the first English player since 2004 after Wayne Rooney to score a goal and provide an assist in his first Champions League game. 

"

Hopefully it can be the first of many,"

Guardiola said of Grealish post-match. "

I have the feeling that every day he is playing better, and I am pretty sure he will be better in the future

.

"His contribution was again high, good. I am delighted with his game."

Manchester City

have won 50 of their 91 Champions League games – becoming the second-fastest team to 50 wins in the tournament's history after

Real Madrid

in 2003 (50 wins in 88 games).

"Of course, I am delighted and happy and thank you to these incredible players we have. It was a really tough game," said Guardiola, who took charge of his 300th match as City manager across all competitions (W219 D36 L45) and the 750th fixture of his career (W547 D113 L90).

"The first game at home it was important to win and we scored six goals. Seventeen goals in the last four games is nice to give to them. Now rest and prepare for Southampton. Nine goals in one game so it is nice for all the people watching.

"A team like RB Leipzig never gives up. They have a clear idea. They attack inside, they put a lot of players inside. They don't have the problem of losing the ball because when they lose the ball they make quick transitions.

"When we have the ball they are there to press you. At the same time when you can regain the ball, pass back and switch play a little bit, you always have a chance to run and score a goal.

"I think the game was tight. We were fortunate that when they scored we were able to score immediately.

"I saw the game against Bayern Munich, they made it 1-2 and Bayern Munich suffered because of the counter-attack. It is an interesting team.

"They have played like this since Ralf Rangnick arrived. They really play. It is one of the best teams in Germany. That is why I am incredibly satisfied with the players for the first victory in the group stage."

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