Expert: Nobody wants a Grexit, but …

Greek exit a 'slippery slope': Pro

A day after Greece sent creditors a "comprehensive" and "realistic" package of reforms for consideration, one strategist urged skepticism Tuesday about Greece's intentions regarding a "Grexit" from the euro zone.

"Nobody really wants the Greeks to exit, except the Greeks know that nobody wants them to exit and they're basically playing the game for as long as they can," Chantico Global founder Gina Sanchez said on CNBC's "Squawk Box".

She said one of the main reasons the European Union does not want Greece to exit the euro zone is because it would set a precedent. "The euro is supposed to be irreversible. So, if one country exits, it would make it reversible," she said.

Sanchez made her remarks after Greek Prime Minister Alexis Tsipras urged its creditors to accept a reform plan sent to them on Monday.

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"We have made concessions—because a compromise demands concessions—we know these concessions will be difficult but we have submitted a realistic plan for Greece to exit the crisis," Tsipras said.

But Sanchez said Greece has lost credibility. "You can't believe a word they're saying right now," she said.

—Reuters contributed to this report.