During the registration process, you will have the opportunity to invite another player to be your doubles partner or set yourself as looking for a partner. You can also invite a doubles partner via the Schedule Tab in your USTA Player Profile. If you are invited as a partner, you will need to accept to create the double pairing.
These three guides will show you how to add/find a partner at registration or after registration
To invite/find/accept a partner while registering for an event:
Invite doubles partner after registration from your USTA account
Setting yourself as looking for a partner after registration
To Invite/Find/Accept Partner While Registering for an event:
Step 1: Register for the tournament/event. Here is a guide to assist: Registering for a Tournament
Step 2: Under the Assign Doubles Partners section of the additional info page, Click Assign Doubles Partner
Step 3: You will see your name, event name, and Partner-no partner assigned. Click Find Partner
Step 4: There are three scenarios here: Choose one option.
- Search by USTA ID
- Choose from Players Looking for a Partner
- Set this Player as Looking for a Partner
Search by USTA ID option
Enter the USTA ID and click FIND A PARTNER. 
Possible outcomes:
1. If your partner is not yet registered for the event, select Send Partner Invite. The partner will receive an email inviting them to register and be your doubles partner. 
- You have been invited by another player to be their doubles partner If the partner is registered for the event and has also invited you as a partner. You need to register for the event yourself and completed the payment. As you complete the registration process in the message on the registration page stating that the player has registered and invited you as a partner. You will now need to confirm the pairing adding their USTA number and by selecting Accept as a partner and click Save and Continue. The doubles pairing will now be created and both players will receive a confirmation email.
2. If the partner has already registered for the event but has not invited you as a partner, click Chose as partner and click Save. The partner will go to the Schedule Tab in their USTA account, select MANAGE next to the tournament, and locate the event they registered for. Under Doubles Partner, they will enter the partner's USTA number, and click Assign. You will receive a message that will state that you registered and have invited them as a partner. They will need to confirm the pairing by selecting Accept as partner. The doubles pairing will be created and both players will receive a confirmation email.
Please note:
- If the partner you invite has already been paired with another player, you will receive an error stating that the partner is already paired for the event. You can then find another partner or reach out to your Tournament Director to change the pairing.
- If you invite a partner who is not eligible for the event, you will receive an error stating that the player is not eligible.
- If you withdraw from the event, the doubles pairing will break, but your partner will still be registered.
Choose from Players Looking for a Partner
If you select the below. It will list the number of players that are looking for a partner as below. Click Find Partner
And then select Choose from the list, if you know the name you can also add the name or USTA ID in the search box. If you choose NOT to select, just click on the X 
Once you click Choose, you will need to confirm again by clicking Choose. The player will recieve an email confirming you have now been paired.
Setting yourself as looking for a partner
If you don't have a partner and would like to be paired with someone else, you can set yourself as looking for a partner. When people are registering, they will be able to select your name as a partner. Once they do this you will receive an email asking you to confirm or decline the partnership. The tournament director will also be able to see that you are available to be partnered after registration closes.
Click Set as 'Looking for a Partner'. 
Invite doubles partner after registration from your USTA account
Step 1: Log into USTA.com and sign in.
Step 2: Select your Profile and then the Schedules Tab and click Manage on the tournament you have registered and wish to add your doubles partner.
Step 3: Click View
Step 4: For the doubles event- click Assign
Step 5: Enter the USTA ID number of your doubles partner
Step 6: Send Partner invite
Setting yourself as looking for a partner after registration
If you don't have a partner and would like to be paired with someone else, you can set yourself as looking for a partner. When people are registering, they will be able to select your name as a partner. Once they do this you will receive an email asking you to confirm or decline the partnership. The tournament director will also be able to see that you are available to be paired with another partner.
Step 1: Log into USTA.com and sign in.
Step 2: Select your Profile and then the Schedules Tab and click Manage on the tournament you have registered and wish to add your looking for status.
Step 3: Click View
Step 4: For the doubles event- click "Find Partner"
Step 5: In the "How do you want to find a partner" drop down, choose out of 3 options
-
- Search by USTA ID
- Choose from players looking for a partner
- Set this player as looking for a partner
Step 6: Confirm your option
Trouble shooting:
Q: What if I no longer want to be listed as 'looking for a partner'.
A: You can cancel this status, head to your schedule in your USTA account and open the event, click manage and then view.
Next to the event in the Doubles Partner section. Click Clear 
A box will appear and you can cancel status, this will remove you from the list. You can then Follow the steps to find a partner as above. 