Display Screen or Portion Thereof with Transitional Graphical User Interface for Sports Streaming Portal

FIG. 1 is a front view of a first image in a sequence of the display screen or portion thereof with transitional graphical user interface for sports streaming portal;

FIG. 2 is a front view of a second image in the sequence; and,

FIG. 3 is a front view of a third image in the sequence.

The subject matter in this patent includes a process or period during which an image sequentially transitions between the images shown in FIGS. 1 - 3 . The process, period, or order in which one image transitions to another image forms no part of the claimed design.

The broken line at the perimeter of the figure illustrates the display screen or portion thereof and the remaining broken lines illustrate portions of the transitional graphical user interface. None of the broken lines form part of the claimed design.