The leading candidate to replace Raikkonen at Lotus is the German Nico Hulkenberg.
Massa, admitted he needs to put his focus on the road in front of him.
According Force India's sporting director Otmar Szafnauer, Pirelli's mid-season tyre specification switch badly hurt some teams like Force India.
According to Blick newspaper, Hulkenberg and his manager Werner Heinz are having "sleepless nights".
Nico Hulkenberg may end up with Force India in 2014.
According to sources inside the Lotus team, Finn Kovalainen will shortly be announced by Lotus as Raikkonen's replacement for the last two Grands Prix of 2013.
Eric Boullier says they gave Kimi Raikkonen the right tools to get his self-confidence back. And confirmed rumors that he is a highest paid driver in 2013.
Lopez insinuated Raikkonen is being ungrateful after Lotus revived his F1 career following his two-year rallying and Nascar sabbatical.
Lotus' budget is going to be boosted with Quantum money, Hulkenberg - is the next step.
Sauber may be down to one Formula One driver by the next Grand Prix.
If all the pieces fit together, Nico Hulkenberg will surely be signed.