The club record £97.5million signing of Romelu Lukaku addressed the biggest issue in his squad – the lack of a top-class goal-scorer.
The Belgium international should score in excess of 20 goals this season, making Chelsea serious title contenders.
And the late, late addition of Saul Niguez gives Tuchel more depth and experience in central midfield – another area he was keen to strengthen.
He has added proven quality to his squad – notably players who will make an immediate impact.
After winning the Champions League last season, it was always going to be about fine-tuning, rather than an overhaul.
A centre back was desired – but it is debatable whether one was really needed. They could yet go back in for Kounde at a later date.
If there is any disappointment, it will be the failure to offload more fringe players, who will struggle to get any game time.
What now for Ruben Loftus-Cheek and Ross Barkley after Saul’s arrival?
Callum Hudson-Odoi will also need to be handled carefully after he saw a loan move to Borussia Dortmund blocked as Chelsea faced an uncertain deadline day.
But this is a squad that looks built to win the title – now it is up to Tuchel to deliver.
Ins and outs
Romelu Lukaku (Inter Milan, £97.5m)
Saul Niguez (Atletico Madrid, £3.4m loan fee)
Marcus Bettinelli (Fulham, free)
Fikayo Tomori (AC Milan, £24m)
Victor Moses (Spartak Moscow, £4.3m)
Izzy Brown (Preston, free)
Luke McCormick (AFC Wimbledon, free)
Olivier Giroud (AC Milan, undisclosed)
Marc Gueho (Crystal Palace, £18m)
Lewis Bate (Leeds, £1.5m)
Myles Peart-Harris (Brentford, £15m)
Dynel Simeu (Southampton, £1.5m)
Valentino Livramento (Southampton, £5m)
Tammy Abraham (Roma, £34m)
Davide Zappacosta (Atalanta, £8m)
Kurt Zouma (West Ham, £29.8)
Matt Miazga (Alaves, loan)
Dujon Sterling (Blackpool, loan)
Henry Lawrence (AFC Wimbledon, loan)
Baba Rahman (Reading, loan)
Tiemoue Bakayoko (Milan, loan)
Conor Gallagher (Crystal Palace, loan)
Danny Drinkwater (Reading, loan)
Ethan Ampadou (Venezia, loan)
Thierno Ballo (Rapid Vienna, loan)