Ronaldo vs. Messi, U.S. vs. Mexico, PSG titles, Pellegrini, Champions League

Football always inspires debate, and this weekend was no exception. Here are five burning questions on the ESPN FC radar.

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Cristiano Ronaldo scored his 300th goal for Real Madrid on Tuesday versus Rayo Vallecano, while Lionel Messi scored his 399th goal for Barcelona on Saturday in their 2-2 draw with Sevilla.

On Saturday, Paris Saint-Germain beat Bastia 4-0 to secure the French League Cup trophy. That's the first of four potential titles for Laurent Blanc's men, who can also win the French Cup, the Ligue 1 season title and the Champions League.

After dropping a 4-2 decision to Manchester United at Old Trafford on Sunday and suffering a 2-1 defeat to Crystal Palace earlier in the week, the hot seat for Manuel Pellegrini at Manchester City is noticeably hotter.

The Champions League quarterfinals get underway this week with a quartet of ties that should get football fans all fired up.

The United States and Mexico meet Wednesday in a friendly that could be a preview of a much more meaningful matchup at this summer's Gold Cup. The U.S. have struggled of late, while Mexico are atop the CONCACAF Power Rankings.

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