Olivier Giroud and Alexis Sanchez have dominated Arsenal's striking options this term, with Lukas Podolski having now joined Inter Milan.
In an attempt to boost their striking options, Pochettino has also been linked with a number of high profile strikers.
Tottenham are said to be looking at Barcelona striker David Villa as they look to improve their striking options.
However, new coach Bob Bradley wasn't convinced by Ching, even though the US faced a paucity of striking options.
New manager Villas-Boas is understood to want to retain Drogba, 33, despite the arrival of Fernando Torres in January and the club's pursuit of other striking options.
Arsène Wenger, the Arsenal manager, will now come under increased pressure to go into the transfer market this month as his striking options diminish further.
Another forward, Daniel Nicolae, has also been ruled out, leaving Romania desperately short of striking options for a game Piturca has been warned Romania has to win.
Manuel Pellegrini, after watching his team rack up four without being at their most sparkling, is glad his striking options are growing at such a critical time.
The only realistic striking options available to him are Cahill and Josh Kennedy, and crossing is the most effective way to use both of these options.
The Spanish champions are desperate to boost their striking options after losing Ruud van Nistelrooy for the remainder of the season through injury.
Chelsea's need to bolster their striking options was confirmed in their second pre-season friendly over AFC Wimbledon, in which Branislav Ivanovic had to fill-in upfront.
