"They can create a mess in a club like us".
Tottenham begin their 2019-20 campaign on Saturday when they host newly-promoted Aston Villa.
Ryan Sessegnon joined on Thursday from Fulham for 25 million and Giovani Lo Celso arrived on loan from Real etis the same day.
Tottenham broke their 18-month-long transfer drought by bringing in Tanguy Ndombele for a club record £62.8m fee in July.
But despite interest from Spurs and manager Mauricio Pochettino, among other top Premier League sides, Sessegnon remained at his hometown club and made 26 Premier League appearances last season, scoring two goals, as Fulham were relegated back to the Championship.
With the fact that Christian Eriksen has made it into the previous year of his contract raising uncertainties over his future even though the domestic transfer window is closed.
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"I am very happy like I told you before I was happy with my squad and now to add some more players", Pochettino said.
Lo Celso only actually joined Betis permanently this summer, having spent past year on loan from Paris Saint-Germain.
Finishing fourth and reaching their first Champions League final with no spending in successive transfer windows and playing "home" matches at Wembley until April because of delays to their new ground was a noble over-achievement for Spurs.
Their last top-flight meeting, in March 2016, ended 2-0 to the north London club courtesy of a Harry Kane brace.
Arsenal were badly in need of defensive recruits to shore up a backline that conceded 51 Premier League goals last season to miss out on Champions League football for a third straight year.
"I really think we could win this trophy".
It finished fourth in the Premier League last season, 27 points behind victor Manchester City.