Besiktas are yet to taste defeat in the competition this season and speaking after Wednesday's 2-1 win over Leipzig, Tosun said he would like to draw the German champions.
The result means that Antonio Conte's team surrendered top spot in Group C to Roma and could now face a daunting prospect in the knockout stages. So United, City and Spurs know they will be up against teams who finished second.
Basel won 2-0 at Benfica to qualify second.
Mbappe scored his powerful header at the age of 18 years, 11 months and 15 days, beating the previous Champions League record by nearly two years.
Teams that already met in the same group or are from the same country can not be drawn against each other on Monday.
Chelsea will join them in the last 16, but ended up second in their group behind Roma.
It is also not possible for teams from the same country to be drawn against each other in this round. Even the English Premier League club Manchester United, who won 2-1 at home against Moscow's CSKA, also moved to the next round of the tournament.
If Liverpool do secure top spot that makes things even trickier for Chelsea.
Accordingly, both the sides are aware of the club they could potentially be up against in the final 16.
Barcelona, Paris Saint-Germain and Besiktas are amongst the opposition that Chelsea can face, but Azpilicueta isn't too anxious about his side's second-placed finish.
Tottenham: Basel (20), Bayern Munich (4), Juventus (5), Seville (7), Shakhtar Donetsk (16) or Porto (12).