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; and,

FIG. 2 is a front view of a second 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 and 2 . The process, period, or order in which one image transitions to another image forms no part of the claimed design.

The outer broken lines illustrate a 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.