In a medium nonporous bowl, combine the soy sauce, Worcestershire sauce and lemon juice and mix well
Place the pork in the bowl, turning to coat well on all sides
Cover and refrigerate for at least two hours, allowing the pork to marinate
Preheat oven to 375 degrees F (190 degrees C)
Place tenderloin in a 9x13 inch baking dish
Bake, uncovered, at 375 degrees F (190 degrees C) for 20 to 30 minutes, or until internal pork temperature reaches 140 degrees F (60 degrees C)
Remove pork from oven
Drain the liquid from the baking dish and reserve for later as a gravy, if desired
Roll out the two puff pastry sheets and wrap each piece of tenderloin in the dough, sealing the edges to completely enclose the meat
Return this to the baking dish
Bake at 375 degrees F (190 degrees C) for 20 minutes, or until the pastry is golden brown