The Chile international has struggled to find consistent form in recent weeks for the Gunners since returning to action from a hamstring injury.
However, the forward reminded Arsenal fans of his sharp shooting with a cool finish late on at White Hart Lane to earn the Gunners a point against their bitter local rivals.
Sanchez was a talismanic figure for Arsenal in the first half of the season, and former Liverpool midfielder Redknapp is now expecting to see the forward find the net more often in the coming games.
Writing in his column for the Daily Mail, Redknapp said: “Alexis Sanchez had not scored for seven games before Saturday.
“He was out of form at the start of the season but after a hat-trick at Leicester I said he’d go on a run.
“He then scored in five games in a row for club and country. Expect him to find form again after this goal.”
Sanchez will be expecting to feature when Arsenal take on Hull City in their FA Cup fifth-round replay on Tuesday night.
Saturday’s draw left Arsene Wenger’s men third in the table and three points behind Tottenham.
MORE: Latest Man Utd news
MORE: Latest Arsenal news
MORE: The latest football news