# Plotting two functions values in two axis

I have two multivariate functions $$f_1(x,y)$$ and $$f_2(x,y)$$. I want a plot in which in the horizontal axis I have the values of $$f_1$$ in a specific point $$(a,b)$$ and on the vertical axis I have the value of $$f_2$$ in the same point $$(a,b)$$. I tried storing the values of the functions in two lists and plot them, but it would be nice to be able to avoid this solution.